BORR Borr Drilling Limited

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Note 1 - General Information

Borr Drilling Limited was incorporated in Bermuda on August 8, 2016. We are listed on the Oslo Stock Exchange ("OSE") and on the New York Stock Exchange ("NYSE") under the ticker "BORR". Borr Drilling Limited is an international offshore drilling contractor providing services to the oil and gas industry. Our primary business is the ownership, contracting and operation of modern jack-up drilling rigs for operations in shallow-water areas (i.e., in water depths up to approximately 400 feet), including the provision of related equipment and work crews to conduct drilling of oil and gas wells and workover operations for exploration and production customers. As of June 30, 2024, we had 22 premium jack-up rigs and had agreed to purchase two additional premium jack-up rigs under construction which are scheduled for delivery in the second half of 2024.

As used herein, and unless otherwise required by the context, the terms “Company,” “Borr”, “we,” “Group,” “our” and words of similar nature refer to Borr Drilling Limited and its consolidated companies. The use herein of such terms as “group”, “organization”, “we”, “us”, “our” and “its”, or references to specific entities, is not intended to be a precise description of corporate relationships.

Note 2 - Basis of Preparation and Accounting Policies

Basis of preparation

The unaudited consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). The unaudited consolidated financial statements do not include all of the disclosures required under U.S. GAAP in the annual consolidated financial statements, and should be read in conjunction with our audited annual financial statements for the year ended December 31, 2023, which are included in our annual report on Form 20-F for the fiscal year ended December 31, 2023, filed with the Securities and Exchange Commission on March 27, 2024. The Consolidated Balance Sheet data as of December 31, 2023 was derived from our audited annual financial statements. The amounts are presented in millions of United States dollars ("U.S. dollar" or "$"), unless otherwise stated. The financial statements have been prepared on a going concern basis and in management's opinion, all adjustments necessary for a fair presentation of the financial statements are reflected in the interim periods presented.

Significant accounting policies

The accounting policies adopted in the preparation of the unaudited condensed consolidated financial statements for the six months ended June 30, 2024 are consistent with those followed in preparation of our annual audited consolidated financial statements for the year ended December 31, 2023, except for the revenue and marketable equity securities accounting policies. During the six months ended June 30, 2024, the revenue accounting policy was updated as a result of the execution of bareboat charter agreements and operating and maintenance agreements with third-parties and the marketable equity securities accounting policy was included as a result of the Company's investment in equity securities.

Revenue

The Company performs services that represent a single performance obligation under its drilling contracts. This performance obligation is satisfied over time. The Company earns revenues primarily by performing the following activities: (i) providing the drilling rig, work crews, related equipment and services necessary to operate the rig (ii) delivering the drilling rig by mobilizing to and demobilizing from the drilling location, and (iii) performing certain pre-operating activities, including rig preparation activities or equipment modifications required for the contract.

The Company recognizes revenues earned under drilling contracts based on variable dayrates, which range from full operating dayrates to lower rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has operating dayrates that change over the firm term of the contract. Such dayrate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services.

The Company recognizes revenues earned in relation to contract management agreements where we provide rig operational and maintenance support services to third parties based either on a cost-plus or dayrate basis. Such consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services.

The Company recognizes revenues earned in relation to certain bareboat charter agreements where we lease our owned rigs to third parties based on fixed daily rates, which range from operating rates to stand-by rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has fixed daily rates that change over the firm term of the contract. Such fixed daily rate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services.

The Company recognizes reimbursement revenues and the corresponding costs, gross, at a point in time, as the Company provides the customer-requested goods and services, when such reimbursable costs are incurred while performing drilling operations. Reimbursable revenues are recognized in 'Dayrate revenue' in the Unaudited Condensed Consolidated Statements of Operations.

Prior to performing drilling operations, the Company may receive pre-operating revenues, on either a fixed lump-sum or variable dayrate basis, for mobilization, contract preparation, customer-requested goods and services or capital upgrades or other upfront payments, which the Company recognizes over time in line with the satisfaction of the performance obligation. These activities are not considered to be distinct

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within the context of the contract and therefore, the associated revenue is allocated to the overall performance obligation and recognized ratably over the expected term of the related drilling contract. We record a contract liability for mobilization fees received, which is amortized ratably to dayrate revenue as services are rendered over the initial term of the related drilling contract.

We may receive fees (on either a fixed lump-sum or variable dayrate basis) for the demobilization of our rigs. Demobilization revenue expected to be received upon contract completion is estimated as part of the overall transaction price at contract inception and recognized over the term of the contract. In most of our contracts, there is uncertainty as to the likelihood and amount of expected demobilization revenue to be received as the amount may vary dependent upon whether or not the rig has additional contracted work following the contract. Therefore, the estimate for such revenue may be constrained, depending on the facts and circumstances pertaining to the specific contract. We assess the likelihood of receiving such revenue based on past experience and knowledge of the market conditions.

Investment in marketable equity securities

Investment in marketable equity securities with readily determinable fair values are measured at fair value each reporting period with the related gains and losses, including unrealized, recognized in “Other financial expenses, net” in the Unaudited Condensed Consolidated Statements of Operations.

We classify our investment in marketable equity securities as current assets because the securities are available to be sold to meet liquidity needs if necessary, even if it is not the intention to dispose of the securities in the next twelve months.

Use of estimates

The preparation of financial statements in accordance with U.S. GAAP requires that management make estimates and assumptions affecting the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Note 3 - Recently Issued Accounting Standards

Adoption of new accounting standards

In June 2022, the Financial Accounting Standards Board ("FASB") issued ASU 2022-03 Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The amendments clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments also clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction and require the following disclosures for equity securities subject to contractual sale restrictions: 1) The fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; 2) The nature and remaining duration of the restriction(s) and 3) The circumstances that could cause a lapse in the restriction(s). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024.

In March 2023, the FASB issued ASU 2023-01 Leases (Topic 842): Common Control Arrangements. The amendments provide a practical expedient for private companies and not-for-profit entities that are not conduit bond obligors to use the written terms and conditions of a common control arrangement to determine whether a lease exists and, if so, the classification of and accounting for that lease. If no written terms and conditions exist (including in situations in which an entity does not document existing unwritten terms and conditions in writing upon transition to the practical expedient), an entity is prohibited from applying the practical expedient and must evaluate the enforceable terms and conditions to apply Topic 842. Also, the amendments require that leasehold improvements associated with common control leases be: 1) Amortized by the lessee over the useful life of the leasehold improvements to the common control group (regardless of the lease term) as long as the lessee controls the use of the underlying asset (the leased asset) through a lease. However, if the lessor obtained the right to control the use of the underlying asset through a lease with another entity not within the same common control group, the amortization period may not exceed the amortization period of the common control group; 2) Accounted for as a transfer between entities under common control through an adjustment to equity (or net assets for not-for-profit entities) if, and when, the lessee no longer controls the use of the underlying asset. Additionally, those leasehold improvements are subject to the impairment guidance in Topic 360, Property, Plant, and Equipment. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024.

In March 2023, the FASB issued ASU 2023-02 Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force). The amendments permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024.

In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this Update improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update: 1) Require that a public entity disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the Chief Operating Decision Maker ("CODM") and included within each reported measure of segment profit or loss; 2) Require that a public entity disclose, on an annual and interim basis, an amount for other segment items by reportable segment and a description of its composition; 3) Require that a public entity provide all annual disclosures about a reportable segment’s profit or loss and

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assets currently required by Topic 280 in interim periods; 4) Clarify that if the CODM uses more than one measure of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources, a public entity may report one or more of those additional measures of segment profit. However, at least one of the reported segment profit or loss measures (or the single reported measure, if only one is disclosed) should be the measure that is most consistent with the measurement principles used in measuring the corresponding amounts in the public entity’s consolidated financial statements; 5) Require that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources; 6) Require that a public entity that has a single reportable segment provide all the disclosures required by the amendments in this Update and all existing segment disclosures in Topic 280. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements and no material impact on our related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024.

Accounting pronouncements that have been issued but not yet adopted

Standard			Description			Date of Adoption			Effect on our Consolidated Financial Statements or Other Significant Matters
ASU 2023-05 Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement			The amendments in this Update address the accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The objectives of the amendments are to: (1) provide decision-useful information to investors and other allocators of capital (collectively, investors) in a joint venture’s financial statements; and (2) reduce diversity in practice. To reduce diversity in practice and provide decision-useful information to a joint venture’s investors, the Board decided to require that a joint venture apply a new basis of accounting upon formation, resulting in a joint venture, upon formation, being required to recognize and initially measure its assets and liabilities at fair value (with exceptions to fair value measurement that are consistent with the business combinations guidance).			January 1, 2025			Under evaluation
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures			The amendments in this Update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). A public business entity is required to provide an explanation, if not otherwise evident, of the individual reconciling items disclosed, such as the nature, effect, and underlying causes of the reconciling items and the judgment used in categorizing the reconciling items. The other amendments in this Update improve the effectiveness and comparability of disclosures by (1) adding disclosures of pretax income (or loss) and income tax expense (or benefit) to be consistent with U.S. Securities and Exchange Commission (SEC) Regulation S-X 210.4-08(h), Rules of General Application—General Notes to Financial Statements: Income Tax Expense, and (2) removing disclosures that no longer are considered cost beneficial or relevant.			January 1, 2025			Under evaluation
ASU 2024-01: Compensation—Stock Compensation (Topic 718)			The amendments in this Update improve GAAP by adding an illustrative example to demonstrate how an entity should apply the scope guidance in paragraph 718-10-15-3 to determine whether a profits interest award should be accounted for in accordance with Topic 718, Compensation—Stock Compensation. The fact patterns in the illustrative example focus on the scope conditions in paragraph 718-10-15-3. The illustrative example is intended to reduce (1) complexity in determining whether a profits interest award is subject to the guidance in Topic 718 and (2) existing diversity in practice.			January 1, 2025			Under evaluation

As of August 15, 2024, the FASB have issued further updates not included above. We do not currently expect any of these updates to have a material impact on our consolidated financial statements and related disclosures either on transition or in future periods.

Note 4 - Segment Information

During the three months ended June 30, 2024 and June 30, 2023, we had a single reportable segment: our operations performed under our dayrate model (which includes rig charters and ancillary services). Our CODM, our Board of Directors, reviews financial information provided

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as an aggregate sum of assets, liabilities and activities that exist to generate cash flows, by our single operating segment. Given that we only have a single reportable segment, allocation of resources by our CODM is not determined by segment profit or loss.

The following presents financial information by segment for the three months ended June 30, 2024:

			Dayrate						Reconciling Items (2)			Consolidated total
Dayrate revenue			226.9						(3.9)			223.0
Bareboat charter revenue			26.6						—			26.6
Management contract revenue			35.1						(23.4)			11.7
Related party revenue			—						10.6			10.6
Gain on disposal			—						0.2			0.2
Rig operating and maintenance expenses			(151.0)						26.9			(124.1)
Depreciation of non-current assets (1)			(31.5)						(0.4)			(31.9)
General and administrative expenses (1)			—						(11.6)			(11.6)
Loss from equity method investments			—						(2.5)			(2.5)
Operating income including equity method investments			106.1						(4.1)			102.0
Total assets			3,434.2						(252.6)			3,181.6
The following presents financial information by segment for the three months ended June 30, 2023:
(in $ millions)			Dayrate						Reconciling Items (2)			Consolidated total
Dayrate revenue			236.9						(81.8)			155.1
Related party revenue			—						32.4			32.4
Gain on disposal			—						0.2			0.2
Rig operating and maintenance expenses			(169.7)						80.2			(89.5)
Depreciation of non-current assets (1)			(27.6)						(0.4)			(28.0)
General and administrative expenses (1)			—						(10.3)			(10.3)
Income from equity method investments			—						3.9			3.9
Operating income including equity method investments			39.6						24.2			63.8
Total assets			3,276.9						(280.8)			2,996.1
The following presents financial information by segment for the six months ended June 30, 2024:
(In $ millions)			Dayrate						Reconciling Items (2)			Consolidated total
Dayrate revenue			460.9						(39.6)			421.3
Bareboat charter revenue			37.9						—			37.9
Management contract revenue			54.5						(42.8)			11.7
Related party revenue			—						35.0			35.0
Gain on disposal			—						0.4			0.4
Rig operating and maintenance expenses			(309.3)						81.2			(228.1)
Depreciation of non-current assets (1)			(63.0)						(0.7)			(63.7)
General and administrative expenses(1)			—						(25.0)			(25.0)
Income from equity method investments			—						2.9			2.9
Operating income including equity method investments			181.0						11.4			192.4

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The following presents financial information by segment for the six months ended June 30, 2023:
(In $ millions)			Dayrate						Reconciling Items (2)			Consolidated total
Dayrate revenue			454.7						(157.9)			296.8
Related party revenue			—						62.7			62.7
Gain on disposal			—						0.3			0.3
Rig operating and maintenance expenses			(329.7)						154.7			(175.0)
Depreciation of non-current assets (1)			(55.4)						(0.8)			(56.2)
General and administrative expenses(1)			—						(22.7)			(22.7)
Income from equity method investments			—						6.3			6.3
Operating income including equity method investments			69.6						42.6			112.2

(1) General and administrative expenses and depreciation expense incurred by our corporate office are not allocated to our operating segment for purposes of measuring segment operating income / (loss) and are included in "Reconciling items."

(2) The full operating results included above for our equity method investments are not included within our consolidated results and thus are deducted under "Reconciling items" and replaced with our income / (loss) from equity method investments (see Note 6 - Equity Method Investments).

Geographic data

Revenues are attributed to geographical location based on the country of operations for drilling activities, and thus the country where the revenues are generated.

The following presents our revenues by geographic area:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
Mexico			80.3			43.0			146.5			82.5
South East Asia			74.4			58.5			138.5			110.4
Middle East			67.8			31.6			129.3			62.2
West Africa			41.3			45.9			76.7			89.3
Europe			8.1			8.5			14.9			15.1
Total			271.9			187.5			505.9			359.5

Major customers

The following customers accounted for more than 10% of our dayrate and related party revenues:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In % of operating revenues)
Saudi Arabian Oil Company			16		%	13		%	16		%	13		%
PTT Exploration and Production Public Company Limited			12		%	9		%	10		%	9		%
ENI Congo S.A.			11		%	14		%	11		%	14		%
Perfomex			4		%	17		%	7		%	18		%
Total			43		%	53		%	44		%	54		%

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Fixed Assets — Jack-up rigs (1)

The following presents the net book value of our jack-up rigs by geographic area:

			June 30, 2024			December 31, 2023
(In $ millions)
Mexico			803.7			815.4
South East Asia			664.7			673.4
Middle East			542.5			553.0
West Africa			437.8			444.8
Europe			89.8			91.7
Total			2,538.5			2,578.3

(1) The fixed assets referred to in the table above exclude assets under construction. Asset locations at the end of a period are not necessarily indicative of the geographical distribution of the revenues or operating profits generated by such assets during the associated periods.

Note 5 - Contracts with Customers

Contract Assets and Liabilities

When the right to consideration becomes unconditional based on the contractual billing schedule, accrued revenue is recognized. At the point that accrued revenue is billed, trade accounts receivable are recognized. Payment terms on invoice amounts are typically 30 days.

Deferred mobilization, demobilization and contract preparation revenue includes revenues received for rig mobilization as well as preparation and upgrade activities, in addition to demobilization revenues expected to be received upon contract commencement and other lump-sum revenues relating to the firm periods of our contracts. These revenues are allocated to the overall performance obligation and recognized on a straight-line basis over the initial firm term of the contracts.

The following presents our contract assets and liabilities from our contracts with customers:

			June 30, 2024			December 31, 2023
(In $ millions)
Accrued revenue (1)			103.8			73.7
Current contract assets			103.8			73.7
Non-current accrued revenue (2)			2.6			2.3
Non-current contract asset			2.6			2.3
Total contract asset			106.4			76.0
Current deferred mobilization, demobilization and other revenue			(33.4)			(59.5)
Current contract liability			(33.4)			(59.5)
Non-current deferred mobilization, demobilization and other revenue			(27.9)			(56.6)
Non-current contract liability			(27.9)			(56.6)
Total contract liability			(61.3)			(116.1)

(1) Accrued revenue includes $14.0 million ($7.3 million as of December 31, 2023) related to the current portion of deferred variable rate revenue, $2.7 million ($1.1 million as of December 31, 2023) pertaining to the current portion of deferred demobilization revenue, and $0.6 million ($1.2 million as of December 31, 2023) related to the current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023).

(2) Non-current accrued revenue includes $2.5 million ($1.5 million as of December 31, 2023) pertaining to the non-current portion of deferred demobilization revenue, and $0.1 million ($0.8 million as of December 31, 2023) related to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023). Non-current accrued revenue is included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets)

Total movement in our contract assets and contract liabilities balances during the six months ended June 30, 2024 are as follows:

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(In $ millions)									Contract assets			Contract liabilities
Balance as of December 31, 2023									76.0			116.1
Performance obligations satisfied during the reporting period									94.2			—
Amortization of revenue									—			(68.7)
Unbilled demobilization revenue									2.6			—
Unbilled variable rate revenue									6.7			—
Performance obligations to be satisfied over time									—			2.6
Unbilled mobilization revenue									0.6			—
Cash received, excluding amounts recognized as revenue									—			11.3
Cash received against the contract asset balance									(73.7)			—
Balance as of June 30, 2024									106.4			61.3

Timing of Revenue

The Company derives its revenue from contracts with customers for the transfer of goods and services, from various activities performed both at a point in time and over time, under the output method.

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Over time			264.4			180.2			492.7			347.1
Point in time			7.5			7.3			13.2			12.4
Total			271.9			187.5			505.9			359.5

Revenue on existing contracts, where performance obligations are unsatisfied or partially unsatisfied at the balance sheet date, is expected to be recognized as follows as at June 30, 2024:

			For the periods ending June 30,
(In $ millions)			2025			2026			2027			2028 onwards
Dayrate revenue			913.9			411.4			65.2			58.5
Other revenue (1)			72.7			36.1			6.7			7.0
Total			986.6			447.5			71.9			65.5

(1) Other revenue represents lump sum revenue associated with contract preparation and mobilization and is recognized ratably over the initial firm term of the associated contract in "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations.

Contract Costs

Deferred mobilization and contract preparation costs relate to costs incurred to prepare a rig for contract and delivery or to mobilize a rig to the drilling location. We defer pre‑operating costs, such as contract preparation and mobilization costs, and recognize such costs on a straight‑line basis, over the estimated firm period of the drilling contract. Costs incurred for the demobilization of rigs at contract completion are recognized as incurred during the demobilization period.

			June 30, 2024			December 31, 2023
(In $ millions)
Current deferred mobilization and contract preparation costs			31.8			39.4
Non-current deferred mobilization and contract preparation costs (1)			31.6			42.6
Total deferred mobilization and contract preparation asset			63.4			82.0

(1) Non-current deferred mobilization and contract preparation costs are included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets).

Deferred mobilization and contract preparation costs decreased by $18.6 million during the six months ended June 30, 2024 to $63.4 million, from $82.0 million as of December 31, 2023 as a result of additional deferred costs of $13.2 million primarily relating to the contract preparations of the rigs "Hild", "Idun", "Thor" and "Ran", offset by amortization of $31.8 million during the six months ended June 30, 2024.

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Note 6 - Equity Method Investments

We own a 51% interest in two Mexico-based joint ventures, Perfomex and Perfomex II. We previously provided five jack-up rigs on bareboat charters to these joint ventures. These joint ventures previously provided dayrate drilling services to Opex Perforadora S.A. de C.V. (“Opex”) and Perforadora Profesional AKAL I, SA de CV (“Akal”), which both provide integrated well services to Petróleos Mexicanos (“Pemex”). Opex and Akal are wholly owned by Operadora Productora y Exploradora Mexicana, S.A. de C.V. (“Operadora”), a fully owned subsidiary of Proyectos Globales de Energia y Servicos CME, S.A. DE C.V. (“CME”). CME owns the remaining 49% interest in our joint ventures Perfomex and Perfomex II.

Effective January 1, 2024, Perfomex and Opex agreed to terminate the Drilling and Technical Services Agreements ("DTSAs") for the jack-up rigs "Grid" and "Gersemi" which triggered a termination fee payable by Opex to Perfomex of $14 million, or $7 million per Borr jack-up rig operated by Perfomex. Effective April 1, 2024, Perfomex and Opex agreed to terminate the Drilling and Technical Services Agreements ("DTSAs") for the jack-up rigs "Galar", "Odin" and "Njord" which triggered a further termination fee payable by Opex to Perfomex of $21 million, or $7 million per Borr jack-up rig. The associated bareboat charter agreements between Perfomex and the Company were also terminated. Effective the same dates as the termination dates referenced above, the Company entered into new fixed rate bareboat charter agreements for the jack-up rigs "Grid", "Gersemi", "Galar", "Odin" and "Njord" with Irish Energy Drilling Assets, DAC ("Irco"). The new bareboat charter agreements remain in effect until December 31, 2025.

In addition, effective January 1, 2024, Perfomex entered into new Drilling, Operation and Management Agreements ("DO&M Agreements") with Perforadora Ircomex, S.A. DE C.V. ("Ircomex") to provide drilling, operations and management services for the Borr jack-up rigs "Grid" and "Gersemi", plus third-party owned jack-up rigs "CME I" and "CME II". Effective April 1, 2024, DO&M Agreements were also entered into by Borr Drilling Contracting S. de R.L. de C.V., a wholly owned subsidiary of the Company, with Ircomex, to provide drilling, operations and management services for the Borr jack-up rigs "Galar", "Odin" and "Njord". These DO&M Agreements are based on a cost-plus pricing model and remain in effect until December 31, 2025.

Irco and Ircomex will continue to provide the jack-up rigs "Grid","Gersemi","Galar", "Odin" and "Njord" and accompanying operational services to Opex, to service its integrated well services contract with Pemex.

The below tables set forth the results from these entities, on a 100% basis, for the three months ended June 30, 2024 and 2023:

			Three months ended June 30, 2024						Three months ended June 30, 2023
In $ millions			Perfomex			Perfomex II			Perfomex			Perfomex II
Revenue			24.5			2.8			72.4			9.4
Operating expenses			(24.0)			(2.9)			(71.6)			(8.6)
Net income			(2.7)			(2.1)			6.0			1.6
The below tables set forth the results from these entities, on a 100% basis, for the six months ended June 30, 2024 and 2023:
			Six months ended June 30, 2024						Six months ended June 30, 2023
In $ millions			Perfomex			Perfomex II			Perfomex			Perfomex II
Revenue			77.6			4.8			142.9			15.0
Operating expenses			(76.4)			(4.8)			(140.0)			(14.7)
Net income / (loss)			7.4			(1.7)			10.1			2.2

As of June 30, 2024, Perfomex and Perfomex II had $95.7 million of receivables from Opex and Akal, of which $89.8 million was outstanding and $5.9 million was unbilled. As of December 31, 2023, Perfomex and Perfomex II had $164.9 million of receivables from Opex and Akal, of which $131.7 million was outstanding and $33.2 million was unbilled.

Summarized balance sheets, on a 100% basis of the Company's equity method investees are as follows:

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			As at June 30, 2024						As at December 31, 2023
In $ millions			Perfomex			Perfomex II			Perfomex			Perfomex II
Cash and restricted cash (1)			3.0			—			11.4			0.5
Total current assets			196.5			33.4			271.4			35.1
Total non-current assets			20.7			2.0			12.3			2.1
Total assets			217.2			35.4			283.7			37.2
Total current liabilities			191.6			23.6			257.2			23.8
Total non-current liabilities			—			0.4			8.3			0.2
Equity			25.6			11.4			18.2			13.2
Total Liabilities and Equity			217.2			35.4			283.7			37.2

(1) As of June 30, 2024, Perfomex had restricted cash of $2.4 million.

The following presents our investments in equity method investments as at June 30, 2024:

In $ millions			Perfomex			Perfomex II			Borr Total
Balance as of December 31, 2023			9.1			6.6			15.7
Income on a percentage basis			3.8			(0.9)			2.9
Balance as of June 30, 2024			12.9			5.7			18.6

Note 7 - Interest Expense

Interest expense is comprised of the following:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Debt interest expense			(47.7)			(38.4)			(92.4)			(75.2)
Amortization of deferred finance charges			(2.8)			(3.2)			(5.5)			(5.0)
Amortization of debt discount			(1.7)			—			(3.4)			—
Amortization of debt premium			0.2			—			0.3			—
Total			(52.0)			(41.6)			(101.0)			(80.2)

Other financial expenses, net is comprised of the following:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Yard cost cover expense			(5.6)			(5.4)			(11.2)			(10.9)
Bank commitment, guarantee and other fees			(0.9)			(0.8)			(1.9)			(1.2)
Foreign exchange loss			(0.2)			(3.2)			(2.3)			(1.6)
Other financial income / (expenses) (1)			0.6			(0.3)			(0.9)			(0.3)
Unrealized changes in value of financial instruments			0.3			—			0.3			—
Total			(5.8)			(9.7)			(16.0)			(14.0)

(1) Other financial expense for the six months ended June 30, 2024 includes $2.3 million of premium paid related to the Convertible Bonds repurchased in March 2024.

Amortization of deferred finance charges for the three months ended June 30, 2023 of $3.2 million and for the six months ended June 30, 2023 of $5.0 million have been presented in Interest expense in the Unaudited Condensed Consolidated Statements of Operations, to conform to the current period's presentation. See Note 7 - Interest Expense.

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Note 9 - Taxation

Borr Drilling Limited is a Bermuda company and is currently not required to pay taxes in Bermuda on ordinary income or capital gains under a tax exemption granted by the Minister of Finance in Bermuda until March 31, 2035. In December 2023, the Bermuda Corporate Income Tax Act was enacted and will apply from January 1, 2025, with a statutory rate of 15%. We operate through various subsidiaries, affiliates and branches in numerous countries throughout the world and are subject to tax laws, policies, treaties and regulations, as well as the interpretation or enforcement thereof, in jurisdictions in which we or any of our subsidiaries, affiliates and branches operate, were incorporated, or are otherwise considered to have a tax presence. Our income tax expense is based upon our interpretation of the tax laws in effect in various countries at the time that the expense was incurred.

Total pre-tax income / (loss) is comprised of the following by jurisdiction:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Bermuda			(7.1)			(15.4)			(49.2)			(30.0)
Foreign			53.7			29.6			128.4			52.1
Total			46.6			14.2			79.2			22.1

The change in the effective tax rate from period to period is primarily attributable to changes in the profitability or loss mix of our operations in various jurisdictions. As our operations continually change among numerous jurisdictions and methods of taxation in these jurisdictions vary greatly, there is little direct correlation between the income tax provision or benefit and income or loss before taxes. We used a discrete effective tax rate method to calculate income taxes.

Income tax (expense) / benefit is comprised of the following:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Current tax			(13.6)			(12.5)			(28.7)			(27.9)
Change in deferred tax			(1.3)			(0.9)			(4.4)			(0.8)
Total			(14.9)			(13.4)			(33.1)			(28.7)

The deferred tax assets related to our net operating losses were primarily generated in the United Kingdom and will not expire. We recognize a valuation allowance for deferred tax assets when it is more likely than not that the benefit from the deferred tax asset will not be realized. The amount of deferred tax assets considered realizable could increase or decrease in the near term if estimates of future taxable income change.

In response to the Organization for Economic Co-Operation and Development (OECD) Base Erosion and Profit Shifting initiative, a 15% worldwide minimum tax implemented on a country-by-country basis has been introduced with many jurisdictions committed to a January 1, 2024, effective date. There remain a number of uncertainties around the final Pillar 2 model rules, and we are closely monitoring developments on this initiative.

Additionally, on December 27, 2023, Bermuda enacted the Corporate Income Tax Act which imposes a 15% tax on Bermuda businesses that are part of multinational enterprise (MNE) groups. The effective date of the income tax is for tax years beginning on or after January 1, 2025. We are actively monitoring the evolving developments of these regulations and evaluating their potential impact on future periods. At present, we expect that they will not have a substantial impact on our financial results in the short term.

Note 10 - Income/(loss) Per Share

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The computation of basic income/(loss) per share (“EPS”) is based on the weighted average number of shares outstanding during the period.

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
Basic income (loss) per share			0.13			—			0.18			(0.03)
Diluted income (loss) per share			0.12			—			0.18			(0.03)
Issued ordinary shares at the end of the period			264,080,391			254,263,598			264,080,391			254,263,598
Net income / (loss) - basic			31.7			0.8			46.1			(6.6)
Convertible bond interest using the if converted method			3.0			—			6.0			—
Net income/(loss) - diluted			34.7			0.8			52.1			(6.6)
Weighted average numbers of shares outstanding for the period, basic			251,189,331			244,777,228			251,953,928			239,806,937
Dilutive effect of share options, RSU and Convertible Bond(1)			37,247,299			4,142,478			37,395,409			—
Weighted average numbers of shares outstanding for the period, diluted			288,436,630			248,919,706			289,349,337			239,806,937

(1) For the three and six months ended June 30, 2024, 8,118,362 share options and 862,780 restricted stock units using the treasury stock method and 33,554,319 shares issuable upon exercise of our convertible bonds due in May 2028 with a conversion price of $7.1347 per share, have been included as they are dilutive. For the three months ended June 30, 2023, 9,028,584 share options and 88,584 restricted stock units using the treasury stock method, have been included as they are dilutive.

The weighted average number of shares outstanding includes 12,081,900 and 14,443,270 shares as of June 30. 2024 and December 31, 2023 shares, respectfully, which have been issued as part of a share lending arrangement relating to the Company's issuance of $250.0 million Convertible Bonds in 2023 (see Note 22 - Common Shares).

The following potential share issuances effects of Convertible Bonds, share options, RSUs and performance units have been excluded from the calculation of diluted EPS for each of the periods presented because the effects were anti-dilutive.

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
Convertible bonds			—			34,027,031			—			34,027,031
Share options			2,100,000			280,000			2,100,000			9,220,000
Performance stock units			750,000			500,000			750,000			500,000
Restricted share units			—			—			—			88,584

For the three and six months ended June 30, 2024, the impact of 2,100,000 stock options and 750,000 performance share units using the treasury stock method were anti-dilutive, as the exercise price was higher than the average share price, and therefore have been excluded from the calculation.

For the three months ended June 30, 2023, the impact of 280,000 stock options and 500,000 performance share units using the treasury stock method were anti-dilutive, as the exercise price was higher than the average share price, and therefore have been excluded from the calculation. In addition, 34,027,031 shares issuable upon exercise of our convertible bonds due in May 2028 with a conversion price of $7.3471 per share, have been excluded as they are anti-dilutive.

Diluted EPS for the six months ended June 30, 2023 does not include the effect of the assumed conversion of potentially dilutive instruments listed above, due to loss sustained in this period as this was deemed to have an anti-dilutive effect on our EPS.

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Note 11 - Other Current Assets

Other current assets are comprised of the following:

			June 30, 2024			December 31, 2023
(In $ millions)
VAT receivable			8.0			16.5
Client rechargeables			5.2			5.3
Other tax receivables			5.6			4.7
Investment in marketable securities (1)			1.8			—
Right-of-use lease asset (2)			0.5			0.5
Deferred financing fee			0.5			0.5
Other receivables			3.2			4.5
Total			24.8			32.0

(1) Investment in marketable equity securities relates to shares purchased in another listed entity. Unrealized gains for the three months ended June 30, 2024 and for the six months ended June 30, 2024 were $0.3 million (nil for the three and six months ended June 30, 2023). See Note 8 - Other Financial Expenses, net. In July 2024, we sold the shares and we no longer hold any investment in marketable equity securities.

(2) The right-of-use lease asset pertains to our office and yard leases.

Note 12 - Newbuildings

The table below sets forth the carrying value of our newbuildings:

			June 30, 2024			December 31, 2023
(In $ millions)
Opening balance			5.4			3.5
Additions			18.0			1.9
Total			23.4			5.4

No rigs were delivered in the six months ended June 30, 2024.

Impairment

During the six months ended June 30, 2024, we considered whether indicators existed that the carrying amounts of our newbuildings may not be recoverable as of June 30, 2024, and concluded that no indicators, events, or changes in circumstances, have occurred to warrant a change in the assumptions utilized in the December 31, 2023 impairment tests of our newbuilding jack-up rig fleet. We will continue to monitor developments in the markets in which we operate for indications that the carrying values of our long-lived assets are not recoverable.

Commitments

The remaining contracted installments as of June 30, 2024 and December 31, 2023, payable on delivery, for the two Keppel newbuilds ordered in 2017, are in total $319.8 million, respectively (see Note 19 - Commitments and Contingencies).

Note 13 - Jack-Up Rigs

Set forth below is the carrying value of our jack-up rigs:

			June 30, 2024			December 31, 2023
(In $ millions)
Opening balance			2,578.3			2,589.1
Additions			23.3			104.7
Depreciation and amortization			(63.1)			(115.5)
Total			2,538.5			2,578.3

Accumulated depreciation related to jack-up rigs as at June 30, 2024 is $661.2 million (as at December 31, 2023 was $598.1 million).

Depreciation of property, plant and equipment

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In addition to the depreciation in the above table, the Company recognized depreciation of $0.3 million and $0.6 million for the three and six months ended June 30, 2024 related to property, plant and equipment ($0.4 million and $0.8 million for the three and six months ended June 30, 2023).

Impairment

During the six months ended June 30, 2024, we considered whether indicators of impairment existed that could indicate that the carrying amounts of our jack-up rigs may not be recoverable as of June 30, 2024, and concluded that no such events or changes in circumstances have occurred to warrant a change in the assumptions utilized in the December 31, 2023 impairment tests of our jack-up rig fleet. We will continue to monitor developments in the markets in which we operate for indications that the carrying values of our long-lived assets are not recoverable.

Note 14 - Leases

We have various operating leases, principally for office space, storage facilities and operating equipment, which expire at various dates.

Supplemental balance sheet information related to leases is as follows:

(In $ millions)			June 30, 2024			December 31, 2023
Operating leases right-of-use assets			1.4			1.6
Current operating lease liabilities			0.5			0.5
Non-current operating lease liabilities			0.9			1.1

The current portion of the right-of-use assets of $0.5 million is recognized within "Other current assets" (see Note 11 - Other Current Assets) and the non-current portion of the right-of-use assets of $0.9 million is recognized within "Other non-current assets" (see Note 15 - Other Non-Current Assets) in the Unaudited Condensed Consolidated Balance Sheets. The current operating lease liabilities are recognized within "Other current liabilities" (see Note 17 - Other Current Liabilities) and the non-current operating lease liabilities are recognized within "Other non-current liabilities" in the Unaudited Condensed Consolidated Balance Sheets.

Components of lease expenses are comprised of the following:

(In $ millions)			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
Rig operating and maintenance expenses			3.3			2.6			6.3			4.9
General and administrative expenses			0.5			0.3			1.0			0.9
Operating lease expense			3.8			2.9			7.3			5.8

Rental income

Effective January 1, 2024, as part of a restructuring of our operations under our joint venture in Mexico, the Company entered into new fixed external bareboat charter agreements for two jack-up rigs and effective April 1, 2024 we entered into further fixed external bareboat charter agreements for three jack-up rigs, which continue to service Opex's contract with Pemex (see Note 6 - Equity Method Investments). Future revenues are based on a blended rate, in line with our revenue recognition policy, as the contract includes daily rates that change over the firm term of the contract.

Revenues from operating leases for the three and six months ended June 30, 2024 of $26.6 million and $37.9 million have been recognized on a straight-line basis as “Bareboat charter revenue” in the Unaudited Condensed Consolidated Statements of Operations. There were nil revenues from operating leases for the three and six months ended June 30, 2023.

The minimum future revenues to be received under the Company's operating leases on its jack-up rigs as of June 30, 2024, are as follows:

(In $ millions)
2024			53.9
2025			106.9
Total minimum contractual future revenues			160.8

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Note 15 - Other Non-Current Assets

Other long-term assets are comprised of the following:

			June 30, 2024			December 31, 2023
(In $ millions)
Deferred mobilization and contract preparation costs (1)			31.6			42.6
Deferred tax asset			14.9			19.3
Deferred demobilization revenue (2)			2.5			1.5
Deferred financing fee			1.5			1.7
Right-of-use lease asset, non-current (3)			0.9			1.1
Liquidated damages (4)			0.1			0.8
Prepayments			0.1			0.3
Total			51.6			67.3

(1) Non-current deferred mobilization and contract preparation costs relate to the non-current portion of contract mobilization and preparation costs for five of our jack-up rigs (see Note 5 - Contracts with Customers).

(2) Non-current deferred demobilization revenue relates to demobilization revenue for two of our jack-up rigs, which will be billed upon contract completion.

(3) The right-of-use lease asset pertains to our offices and yard leases.

(4) Relates to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two contracts as at December 31, 2023), which is amortized over the firm contract terms and recognized as reduction of "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations.

Note 16 - Accrued Expenses

Accrued expenses are comprised of the following:

			June 30, 2024			December 31, 2023
(In $ millions)
Accrued goods and services received, not invoiced			18.2			19.7
Accrued payroll and bonus			10.6			12.3
Other accrued expenses (1)			40.9			45.0
Total			69.7			77.0

Note 17 - Other Current Liabilities

Other current liabilities are comprised of the following:

			June 30, 2024			December 31, 2023
(In $ millions)
VAT payable			21.0			17.5
Other current taxes payable (1)			20.0			19.7
Corporate income taxes payable			6.6			6.7
Accrued payroll and severance			1.2			0.8
Operating lease liability, current			0.5			0.5
Dividends payable (2)			—			11.9
Other current liabilities			3.3			6.1
Total			52.6			63.2

(1) Other current taxes payable include withholding tax, payroll tax and other indirect tax related liabilities.

(2) On December 22, 2023, the Company declared a cash distribution of $0.05 per share, corresponding to a total of $11.9 million, which was paid to our shareholders on January 22, 2024.

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Note 18 - Debt

Short-term debt is comprised of the following:

			Principal Amount
(In $ millions)			June 30, 2024			December 31, 2023
2028 Notes			75.0			75.0
2030 Notes			25.0			25.0
Additional 2028 Notes			14.6			—
Principal Outstanding			114.6			100.0
Deferred Finance Charges (1)			(11.1)			(10.3)
Debt discount			(6.8)			(6.8)
Debt premium			1.1			—
Carrying Value Short-Term Debt (2)			97.8			82.9

Long-term debt is comprised of the following:

			Principal Amount
(In $ millions)			June 30, 2024			December 31, 2023
2028 Notes			912.5			950.0
2030 Notes			477.5			490.0
Convertible Bonds			239.4			250.0
Additional 2028 Notes			178.0			—
Principal Outstanding			1,807.4			1,690.0
Deferred Finance Charges (1)			(37.9)			(40.5)
Debt discount			(27.3)			(30.7)
Debt premium			3.6			—
Carrying Value Long-Term Debt (2)			1,745.8			1,618.8

(1) As at June 30, 2024, deferred finance charges include the unamortized legal and bank fees associated with the 2028 Notes, Additional 2028 Notes, 2030 Notes, Convertible Bonds, our undrawn $150.0 million revolving credit facility as well as the unamortized debt issuance cost associated with the fair value of the Share Lending Agreement (see Note 22 - Common Shares).

(2) Carrying amounts in the table above include, where applicable, deferred financing fees, debt discounts and debt premiums.

At June 30, 2024 the scheduled maturities of our debt were as follows:

			Maturities
(In $ millions)
2024			57.2
2025			114.6
2026			114.6
2027			114.6
Thereafter			1,521.0
Total principal debt			1,922.0

Issuance of Additional Senior Secured Notes Due 2028

On November 7, 2023, the Company's wholly owned subsidiary Borr IHC Limited, and certain other subsidiaries, issued $1,540.0 million in aggregate principal amount of senior secured notes, consisting of $1,025.0 million principal amount of senior secured notes due 2028 at a price equal to 97.750%, bearing a coupon of 10% per annum (the "2028 Notes"), and $515.0 million principal amount of senior secured notes due 2030 at a price equal to 97.000%, bearing a coupon of 10.375% per annum (the "2030 Notes"). The 2028 Notes mature on November 15, 2028 and the 2030 Notes mature on November 15, 2030, and interest on the 2028 Notes and 2030 Notes is payable on May 15 and November 15 of each year, beginning on May 15, 2024.

In March 2024, the Company issued $200.0 million principal amount of additional senior secured notes due in 2028 (the "Additional 2028 Notes" and, together with the 2028 Notes and the 2030 Notes, the "Notes") under the same terms and conditions as the $1,025.0 million notes

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issued in November 2023. The Additional 2028 notes were issued at a price equal to 102.5% plus accrued interest, raising gross proceeds of $211.9 million.

Repurchase of Unsecured Convertible Bonds due 2028 (Convertible Bonds)

In February 2023, we issued $250.0 million of unsecured convertible bonds, which mature in February 2028. The initial conversion price was $7.3471 per share, convertible into 34,027,031 common shares. In March 2024 we repurchased $10.6 million of the Convertible Bonds at an average price of 120.88% of par for a total consideration of $12.9 million, inclusive of accrued interest, and recognized a loss in "Other financial expenses, net" of $2.3 million. Following the declaration and payment of a $0.05 per share cash distribution in each of January and March 2024 as well as a $0.10 per share cash distribution in May 2024, the adjusted conversion price is $7.13147 per share, with the current amount of convertible bonds convertible into 33,554,319 shares. The convertible bonds have a coupon of 5% per annum payable semi-annually in arrears in equal installments. The terms and conditions governing our convertible bonds contain customary events of default, including failure to pay any amount due on the bonds when due, and certain restrictions, including, among others, restrictions on disposal of assets and our ability to carry out any merger or corporate reorganization, subject to exceptions.

Interest

The weighted average nominal interest rate for all of our interest-bearing debt was 9.7% for the six months ended June 30, 2024 (8.9% for the six months ended June 30, 2023). Excluding our Convertible Bonds, the weighted average interest rate for our interest-bearing debt was 10.3% for the six months ended June 30, 2024 (10.3% for the six months ended June 30, 2023).

Covenants

Note 19 - Commitments and Contingencies

The Company has the following delivery installment commitments:

			June 30, 2024			December 31, 2023
(in $ millions)
Delivery installments for jack-up drilling rigs			319.8			319.8
Total			319.8			319.8

In September 2023, we entered into an agreement with Seatrium New Energy Limited to amend the Construction Contract for the Vali and the Var to expedite their delivery dates, on a best efforts basis only, to August 2024 and November 2024, respectively, in consideration for an additional payment of $12.5 million (acceleration costs) per rig on each respective delivery date.

The following table sets forth when our delivery installment commitments fall due as of June 30, 2024, based upon best efforts expedited delivery dates:

(In $ millions)			Less than 1 year			1-2 years			2-3 years			Thereafter			Total
Delivery installments for jack-up rigs			319.8			—			—			—			319.8

Other commercial commitments

We have other commercial commitments which contractually obligate us to settle with cash under certain circumstances. Bank and parent company guarantees entered into between certain customers and governmental bodies guarantee our performance regarding certain drilling contracts, customs import duties and other obligations in various jurisdictions.

The Company has the following guarantee commitments:

			June 30, 2024			December 31, 2023
(in $ millions)
Bank guarantees, letters of credit and performance bonds			27.6			29.0
Total			27.6			29.0

As at June 30, 2024, the expected expiration dates of these obligations are as follows:

(In $ millions)			Less than 1 year			1–3 years			Thereafter			Total
Bank guarantees and performance bonds			8.2			13.8			5.6			27.6

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Assets pledged as collateral

			June 30, 2024			December 31, 2023
(in $ millions)
Book value of jack-up rigs pledged as collateral for debt facilities			2,538.5			2,578.3

Note 20 - Related Party Transactions

a) Transactions with entities over which we have significant influence

We provided three rigs on a bareboat basis to Perfomex to service its contracts with Opex and two rigs on a bareboat basis to Perfomex II to service its contract with Akal. Perfomex and Perfomex II provided the jack-up rigs under traditional dayrate and technical service agreements ("DTSAs") to Opex and Akal, respectively. This structure enabled Opex and Akal to provide bundled integrated well services to Pemex. Effective October 20, 2022 until December 31, 2023, we provided all five rigs on a bareboat basis to Perfomex, to service its contracts with Opex. The bareboat revenue from these contracts is recognized as "Related party revenue" in the Unaudited Condensed Consolidated Statements of Operations.

Effective January 1, 2024, Perfomex and Opex agreed to terminate the DTSAs for the jack-up rigs "Grid" and "Gersemi" and effective April 1, 2024, Perfomex and Opex agreed to terminate the DTSAs for the jack-up rigs "Galar", "Odin" and "Njord". The associated bareboat charter agreements between Perfomex and the Company were also terminated. Effective the same dates as the termination dates referenced above, the Company entered into new fixed rate bareboat charter agreements for the jack-up rigs with an unrelated party, which has agreed to provide the five rigs to service Opex's contract with Pemex. As such, effective April 1, 2024, we do not provide rigs on a bareboat basis to Perfomex (see Note 6 - Equity Method Investments and Note 14 - Leases).

For the three and six months ended June 30, 2024 and 2023, the bareboat revenues from our related parties consisted of the following:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Bareboat Revenue - Perfomex			10.6			32.4			35.0			62.7
Total			10.6			32.4			35			62.7

The bareboat revenue for the three months ended June 30, 2024 consisted primarily of amortization of deferred revenue associated with the acceleration of amortization of the deferred performance fee associated with the jack-up rigs "Galar", "Odin" and "Njord" as a consequence of the termination of the bareboat charter agreements between Perfomex and the Company, effective April 1, 2024.

For the three and six months ended June 30, 2024 and 2023, repayment of loans from our equity method investments consisted of the following:

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Perfomex			—			(9.8)			—			(9.8)
Total			—			(9.8)			—			(9.8)

Receivables: The balances with the joint ventures as of June 30, 2024 and December 31, 2023 consisted of the following:

			June 30, 2024			December 31, 2023
(In $ millions)
Perfomex			79.0			92.4
Perfomex II			0.4			2.6
Total			79.4			95.0

b) Transactions with Other Related Parties

Expenses: The transactions with other related parties for six months ended June 30, 2024 and 2023 consisted of the following:

---

			Three months ended June 30, 2024			Three months ended June 30, 2023			Six months ended June 30, 2024			Six months ended June 30, 2023
(In $ millions)
Magni Partners Limited (1)			—			(0.1)			—			(0.2)
Drew Holdings Limited (2)			—			(0.3)			—			(1.0)
Front End Limited Company (3)			(0.8)			(0.6)			(2.2)			(1.1)

(1) Magni Partners Limited ("Magni") is a party to a Corporate Services Agreement with the Company, pursuant to which it provides strategic advice and assists in sourcing investment opportunities, financing and other such services as the Company wishes to engage, at the Company's option. There is both a fixed and variable element of the agreement, with the fixed cost element representing Magni's fixed costs and any variable element being at the Company's discretion. Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Magni. Effective January 1, 2024, the fixed element of the agreement was terminated, while the remaining terms of the agreement continue to remain in force.

(2) Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Drew Holdings Limited ("Drew"). In January 2023 Drew entered into a Share Lending Framework Agreement ("SLFA") with the Company and DNB Markets for the purposes of facilitating investors’ hedging activities in connection with the Senior Unsecured Convertible bonds due 2028. In order to make the Company's shares available for lending, and only until a certain number of new shares were issued by the Company in connection with such lending arrangement, Drew made up to 15 million shares available to DNB Markets under the SLFA to facilitate such lending to the convertible bond investors requiring such hedging activities. Under the terms of the SLFA, the Company incurred fees payable to Drew for the shares available for lending. As at December 31, 2023, Drew is no longer a party to the SLA (see Note 22 - Common Shares).

(3) Front End Limited Company ("Front End") owns 3% of Borr Arabia Well Drilling LLC, an entity that is consolidated by Borr Drilling Limited and incorporated in the Kingdom of Saudi Arabia (the "KSA"). Front End is a party to a Management Agreement with Borr Arabia Well Drilling LLC to provide management services in the KSA, for which it receives a management fee.

In addition, in January 2023, the Company recognized $1.3 million payable to Magni under a Call-off Contract to cover direct costs related to assistance in relation to the Unsecured Convertible Bonds and Secured Bonds completed in February 2023 and in November 2023, the Company recognized $1.0 million payable to Magni under a Call-off Contract to cover direct costs related to assistance in relation to 2028 and 2030 Notes completed in November 2023. As these costs are directly attributable to the issuance of these bonds, these amounts were recognized as deferred finance charges, presented as a reduction to the carrying value of the associated facilities and are amortized over the term of the facilities as "Interest Expense" in the Unaudited Condensed Consolidated Statements of Operations.

Note 21 - Fair Value of Financial Instruments

We recognize our fair value estimates using a fair value hierarchy based on the inputs used to measure fair value. The fair value hierarchy has three levels based on reliability of inputs used to determine fair value as follows:

Level 1: Quoted market prices in active markets for identical assets and liabilities.

Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data.

Level 3: Unobservable inputs that are not corroborated by market data

The carrying value and estimated fair value of our financial instruments at June 30, 2024 and December 31, 2023 were as follows:

						As at June 30, 2024						As at December 31, 2023
(In $ millions)			Hierarchy			Fair value			Carrying value			Fair value			Carrying value
Assets
Cash and cash equivalents (1)			1			193.5			193.5			102.5			102.5
Restricted cash (1)			1			1.0			1.0			0.1			0.1
Trade receivables (1)			1			99.1			99.1			56.2			56.2
Other current assets (excluding deferred costs) (1)			1			24.3			24.3			31.5			31.5
Due from related parties (1)			1			79.4			79.4			95.0			95.0
Liabilities
Trade payables (1)			1			58.3			58.3			35.5			35.5
Accrued expenses (1)			1			69.7			69.7			77.0			77.0
Short term accrued interest and other items (1)			1			37.2			37.2			42.3			42.3
Other current liabilities (1)			1			52.6			52.6			63.2			63.2
Short-term debt (2) (3)			2			120.3			114.6			104.4			100.0
Long-term debt (2) (4)			2			1,927.6			1,807.4			1,818.0			1,690.0

(1) The carrying values approximate the fair values due to their near term expected receipt of cash.

---

(2) Short term and long term debt excludes debt discounts, debt premiums and deferred finance charges.

(3) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030. These are fair valued using observable market-based inputs.

(4) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030 and our Convertible Bonds due 2028 These are fair valued using observable market-based inputs.

Share Lending Agreement

Note 22 - Common Shares

Authorized share capital

			June 30, 2024			December 31, 2023
(Number of shares of $0.10 each)
Authorized shares			315,000,000			315,000,000

Issued and outstanding share capital

			June 30, 2024			December 31, 2023
(Number of shares of $0.10 each)
Issued			264,080,391			264,080,391
Treasury shares			13,448,389			11,498,355
Outstanding			250,632,002			252,582,036

Share Lending Agreement

In connection with the Convertible Bonds (see Note 18 - Debt), during 2023, the Company entered into a Share Lending Framework Agreement ("SLFA") with DNB Markets ("DNB") and Drew Holdings Limited ("Drew") with the intention of making up to 25.0 million common shares ("Issuer Lending Shares") available to lend to DNB for the purposes of allowing the holders of the New Convertible Bonds to perform hedging activities on the OSE. The SLFA contains a provision that the Issuer Lending Shares be available only for trading on the OSE. At the date of the execution of the SLFA, the Company did not have a sufficient number of common shares available for trading on the OSE and therefore began the process of issuing new shares and making them available for trading on the OSE by way of a listing prospectus (the “Prospectus Event”).

The Company and Drew, a shareholder of the Company, separately entered into a Share Loan Agreement (“SLA”) in which Drew would make up to 15.0 million of its shares available to DNB (“Drew Shares”) until the Prospectus Event. During this period, the Company would lend to Drew 15.0 million of its shares that were not yet available for trading on the OSE. The Prospectus Event occurred on April 19, 2023, at which time Drew returned such shares back to Borr. In addition, DNB borrowed an equivalent amount of Drew Shares from Borr to redeliver these shares back to Drew (the “Settlement”).

The "Loan Period" of the SLFA is defined as the earlier of (a) the date the SLFA is terminated (b) any date the convertible bonds are either redeemed or converted into the Company’s shares in full and (c) the maturity date of the convertible bond in 2028. At the expiration of the Loan Period, DNB must return all of the Issuer Lending Shares back to Borr. During the Loan Period, if an investor returns any lending share to DNB, DNB shall return such lending shares back to the Company immediately. The Company receives no proceeds from lending out the Issuer Lending Shares to DNB. DNB must charge each investor a lending fee of a maximum of 0.5% per annum in which for the first six months from the date of the SLFA, the Company agrees to compensate DNB so that the lending fee DNB receives in total will be 1.0% per annum. There is no compensation that the Company pays DNB for returning the Issuer Lending Shares to the Company. There is no unilateral mechanism given to either party in choosing to settle in cash except for a very limited scenario involving default. DNB is not required to provide collateral for borrowing the shares. There are no dividends paid to DNB as a result of lending out the Issuer Lending Shares.

At issuance, the share lending agreement was accounted for under ASC 470-20 as a "Deferred Finance Charge" of the Convertible Bonds, with an offset to "Additional Paid in Capital" in the Unaudited Condensed Consolidated Balance Sheets. The share lending agreement was measured at a fair value in accordance with ASC 820 at inception and the Company recognized $12.4 million accordingly.

As of June 30, 2024, the Company had loaned 12,081,900 shares in total to DNB for the purposes of allowing the holders of the New Convertible Bonds to perform hedging activities on the OSE.

As of June 30, 2024, the unamortized amount of the issuance costs associated with the SLFA was $2.5 million ($2.5 million as at December 31, 2024) included in "Short-term debt" and $6.4 million ($7.6 million as at December 31, 2023) included in "Long-term debt" in our Unaudited Condensed Consolidated Balance Sheets. During the three and six months ended June 30, 2024 $0.6 million and $1.2 million of amortization of issuance costs associated with the SLFA was recognized in "Interest expense" in the Unaudited Condensed Consolidated Statements of Operations. During the three and six months ended June 30, 2023, $1.0 million and $1.0 million of amortization of issuance costs associated with the SLFA were recognized.

---

Share option plan

During the three months ended June 30, 2024, no share options were exercised. During the six months ended June 30, 2024, the Company issued 411,336 treasury shares following the exercise of 411,336 share options.

Dividends

On May 22, 2024, the Company declared a cash distribution of $0.10 per share, corresponding to a total of $23.9 million, which was paid to our shareholders on June 17, 2024.

On February 22, 2024, the Company declared a cash distribution of $0.05 per share, corresponding to a total of $11.9 million, which was paid to our shareholders on March 18, 2024.

Note 23 - Subsequent Events

In November 2023, the Company entered into a $180 million Super Senior Credit Facility, comprised of a $150 million RCF and a $30.0 million Guarantee Facility. In August 2024, the Company amended the $30.0 million Guarantee Facility increasing the Guarantee Facility to $45.0 million and the total facility to $195.0 million.

In August 2024, we issued $150.0 million principal amount of additional 10% Senior Secured Notes due in 2028 under the same terms and conditions as the $1,025.0 million Senior Secured Notes due 2028 issued in November 2023 and the additional $200.0 million issued in March 2024.

On August 14, 2024, the Company declared a cash distribution of $0.10 per share, which is expected to be paid to our shareholders on or around September 6, 2024.

v3.24.2.u1

Cover	6 Months Ended
	Jun. 30, 2024
Cover [Abstract]
Document Type	6-K
Entity File Number	001-39007
Entity Registrant Name	Borr Drilling Limited
Entity Central Index Key	0001715497
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Period End Date	Jun. 30, 2024
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31

v3.24.2.u1

Unaudited Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating revenues
Total operating revenues	$ 271.9	$ 187.5	$ 505.9	$ 359.5
Gain on disposals	0.2	0.2	0.4	0.3
Operating expenses
Rig operating and maintenance expenses	(124.1)	(89.5)	(228.1)	(175.0)
Depreciation of non-current assets	(31.9)	(28.0)	(63.7)	(56.2)
General and administrative expenses	(11.6)	(10.3)	(25.0)	(22.7)
Total operating expenses	(167.6)	(127.8)	(316.8)	(253.9)
Operating income	104.5	59.9	189.5	105.9
(Loss) / income from equity method investments	(2.5)	3.9	2.9	6.3
Financial income (expenses), net
Interest income	2.4	1.7	3.8	4.1
Interest expense	(52.0)	(41.6)	(101.0)	(80.2)
Other financial expenses, net	(5.8)	(9.7)	(16.0)	(14.0)
Total financial expenses, net	(55.4)	(49.6)	(113.2)	(90.1)
Income before income taxes	46.6	14.2	79.2	22.1
Income tax expense	(14.9)	(13.4)	(33.1)	(28.7)
Net income / (loss)	31.7	0.8	46.1	(6.6)
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	$ 31.7	$ 0.8	$ 46.1	$ (6.6)
Earnings Per Share [Abstract]
Basic loss per share (in dollars per share)	$ 0.13	$ 0	$ 0.18	$ (0.03)
Diluted loss per share (in dollars per share)	$ 0.12	$ 0	$ 0.18	$ (0.03)
Weighted-average shares outstanding, basic (in shares)	251,189,331	244,777,228	251,953,928	239,806,937
Weighted-average shares outstanding, diluted (in shares)	288,436,630	248,919,706	289,349,337	239,806,937
Related party revenue
Operating revenues
Total operating revenues	$ 10.6	$ 32.4	$ 35.0	$ 62.7
Dayrate revenue | Nonrelated party
Operating revenues
Total operating revenues	223.0	155.1	421.3	296.8
Bareboat charter revenue | Nonrelated party
Operating revenues
Total operating revenues	26.6	0.0	37.9	0.0
Management contract revenue | Nonrelated party
Operating revenues
Total operating revenues	$ 11.7	$ 0.0	$ 11.7	$ 0.0

v3.24.2.u1

Unaudited Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 193.5	$ 102.5
Restricted cash	1.0	0.1
Prepaid expenses	12.8	11.0
Deferred mobilization and contract preparation costs	31.8	39.4
Accrued revenue	103.8	73.7
Other current assets	24.8	32.0
Total current assets	546.2	409.9
Non-current assets
Property, plant and equipment	3.3	3.5
Newbuildings	23.4	5.4
Jack-up drilling rigs, net	2,538.5	2,578.3
Equity method investments	18.6	15.7
Other non-current assets	51.6	67.3
Total non-current assets	2,635.4	2,670.2
Total assets	3,181.6	3,080.1
Current liabilities
Trade payables	58.3	35.5
Accrued expenses	69.7	77.0
Short-term accrued interest and other items	37.2	42.3
Short-term debt	97.8	82.9
Short-term deferred mobilization, demobilization and other revenue	33.4	59.5
Other current liabilities	52.6	63.2
Total current liabilities	349.0	360.4
Non-current liabilities
Long-term debt	1,745.8	1,618.8
Long-term deferred mobilization, demobilization and other revenue	27.9	56.6
Other non-current liabilities	5.2	5.8
Onerous contracts	54.5	54.5
Total non-current liabilities	1,833.4	1,735.7
Total liabilities	2,182.4	2,096.1
Shareholders’ Equity
Common shares of par value $0.10 per share: authorized 315,000,000 (2023:315,000,000) shares, issued 264,080,391 (2023: 264,080,391) shares and outstanding 250,632,002 (2023: 252,582,036) shares	26.5	26.5
Treasury shares	(9.1)	(8.9)
Additional paid in capital	342.3	337.2
Contributed surplus	1,952.3	1,988.1
Accumulated deficit	(1,312.8)	(1,358.9)
Total equity	999.2	984.0
Total liabilities and equity	3,181.6	3,080.1
Related party revenue
Current assets
Trade receivables, net	79.4	95.0
Nonrelated party
Current assets
Trade receivables, net	$ 99.1	$ 56.2

v3.24.2.u1

Unaudited Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Shareholders’ Equity
Ordinary shares, par value (in dollars per share)	$ 0.10	$ 0.10
Authorized shares (in shares)	315,000,000	315,000,000
Common stock, shares issued (in shares)	264,080,391	264,080,391	254,263,598
Common stock, shares outstanding (in shares)	250,632,002	252,582,036

v3.24.2.u1

Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net income / (loss)		$ 31.7	$ 0.8	$ 46.1	$ (6.6)
Adjustments to reconcile net income / (loss) to net cash provided by / (used in) operating activities:
Non-cash compensation expense related to stock based employee and directors' compensation		1.8	1.3	3.6	2.6
Depreciation of non-current assets		31.9	28.0	63.7	56.2
Amortization of deferred mobilization and contract preparation costs		17.1	11.2	31.8	24.8
Amortization of deferred mobilization, demobilization and other revenue		(42.5)	(15.1)	(68.7)	(30.5)
Gain on disposal of assets		(0.2)	(0.2)	(0.4)	(0.3)
Amortization of debt discount		1.7	0.0	3.4	0.0
Amortization of debt premium		(0.2)	0.0	(0.3)	0.0
Amortization of deferred finance charges		2.8	3.2	5.5	5.0
Bank commitment, guarantee and other fees		0.0	0.3	0.0	0.3
Effective interest rate adjustments		0.0	(1.5)	0.0	(3.2)
Change in fair value of financial instruments		(0.3)	0.0	(0.3)	0.0
Loss / (income) from equity method investments		2.5	(3.9)	(2.9)	(6.3)
Deferred income tax		(1.3)	0.9	(4.4)	0.8
Change in assets and liabilities:
Amounts due to/from related parties		13.9	(9.6)	10.7	(16.2)
Accrued expenses		(2.7)	0.1	(12.0)	(1.6)
Accrued interest		(44.2)	(22.0)	(9.1)	(7.5)
Other current and non-current assets		(26.0)	(13.5)	(71.8)	(31.8)
Other current and non-current liabilities		23.1	22.4	38.1	8.5
Net cash provided by / (used in) operating activities		9.1	2.4	33.0	(5.8)
Cash flows from investing activities
Purchase of property, plant and equipment		(0.2)	(0.7)	(0.4)	(0.9)
Repayment of loan from equity method investments		0.0	9.8	0.0	9.8
Additions to newbuildings		(6.4)	0.0	(9.7)	0.0
Additions to jack-up drilling rigs		(6.8)	(25.0)	(22.0)	(53.8)
Net cash used in investing activities		(13.4)	(15.9)	(32.1)	(44.9)
Cash flows from financing activities
Repayments of debt	[1]	(60.3)	(186.4)	(70.9)	(400.3)
Cash dividends paid		(23.9)	0.0	(47.7)	0.0
Debt proceeds, gross of premium / (net of discount) and issuance costs		0.0	25.0	208.3	416.3
Proceeds from exercise of share options		0.0	0.0	1.3	0.0
Net cash (used in) / provided by financing activities		(84.2)	(161.4)	91.0	16.0
Net (decrease) / increase in cash, cash equivalents and restricted cash		(88.5)	(174.9)	91.9	(34.7)
Cash, cash equivalents and restricted cash at the beginning of the period		283.0	258.7	102.6	118.5
Cash, cash equivalents and restricted cash at the end of the period		194.5	83.8	194.5	83.8
Supplementary disclosure of cash flow information
Interest paid		(91.9)	(67.1)	(98.2)	(96.6)
Income taxes paid		(17.2)	(7.9)	(30.0)	(17.9)
Cash and cash equivalents		193.5		193.5
Restricted cash		1.0		1.0
Total cash and cash equivalents and restricted cash		$ 194.5	$ 83.8	$ 194.5	$ 83.8
[1] Included in repayment of debt is the redemption premium on our Senior Secured Notes due in 2028 and 2030

v3.24.2.u1

Unaudited Consolidated Statements of Changes in Shareholders’ Equity - USD ($) $ in Millions	Total	Common shares	Treasury shares	Additional paid in capital	Contributed Surplus	Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2022		228,948,087
Beginning balance at Dec. 31, 2022	$ 897.8	$ 23.0	$ (9.8)	$ 2,265.6	$ 0.0	$ (1,381.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of common shares (in shares)		15,000,000
Issue of common shares	1.5	$ 2.5	(1.0)
Convertible debt issuance cost	10.9			10.9
Share-based compensation	1.3			1.3
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	(7.4)					(7.4)
Ending balance (in shares) at Mar. 31, 2023		243,948,087
Ending balance at Mar. 31, 2023	904.1	$ 25.5	(10.8)	2,277.8	0.0	(1,388.4)
Beginning balance (in shares) at Dec. 31, 2022		228,948,087
Beginning balance at Dec. 31, 2022	897.8	$ 23.0	(9.8)	2,265.6	0.0	(1,381.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	(6.6)
Ending balance (in shares) at Jun. 30, 2023		245,102,732
Ending balance at Jun. 30, 2023	906.2	$ 25.5	(10.7)	2,279.0	0.0	(1,387.6)
Beginning balance (in shares) at Mar. 31, 2023		243,948,087
Beginning balance at Mar. 31, 2023	904.1	$ 25.5	(10.8)	2,277.8	0.0	(1,388.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of common shares (in shares)		1,154,645
Issue of common shares	0.0		0.1	(0.1)
Equity issuance costs	0.0
Share-based compensation	1.3			1.3
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	0.8					0.8
Ending balance (in shares) at Jun. 30, 2023		245,102,732
Ending balance at Jun. 30, 2023	906.2	$ 25.5	(10.7)	2,279.0	0.0	(1,387.6)
Beginning balance (in shares) at Dec. 31, 2023		252,582,036
Beginning balance at Dec. 31, 2023	984.0	$ 26.5	(8.9)	337.2	1,988.1	(1,358.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issue of common shares (in shares)		3,067
Issue of common shares	0.0
Share based compensation (in shares)		411,336
Share-based compensation	3.1		0.1	3.0
Distribution to shareholders	(11.9)				(11.9)
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	14.4					14.4
Ending balance (in shares) at Mar. 31, 2024		252,996,439
Ending balance at Mar. 31, 2024	989.6	$ 26.5	(8.8)	340.2	1,976.2	(1,344.5)
Beginning balance (in shares) at Dec. 31, 2023		252,582,036
Beginning balance at Dec. 31, 2023	984.0	$ 26.5	(8.9)	337.2	1,988.1	(1,358.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	46.1
Ending balance (in shares) at Jun. 30, 2024		250,632,002
Ending balance at Jun. 30, 2024	999.2	$ 26.5	(9.1)	342.3	1,952.3	(1,312.8)
Beginning balance (in shares) at Mar. 31, 2024		252,996,439
Beginning balance at Mar. 31, 2024	989.6	$ 26.5	(8.8)	340.2	1,976.2	(1,344.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Movement in treasury shares (in shares)		(2,364,437)
Movement in treasury shares	0.0		(0.3)	0.3
Share-based compensation	1.8			1.8
Distribution to shareholders	(23.9)				(23.9)
Total comprehensive income / (loss) attributable to shareholders of Borr Drilling Limited	31.7					31.7
Ending balance (in shares) at Jun. 30, 2024		250,632,002
Ending balance at Jun. 30, 2024	$ 999.2	$ 26.5	$ (9.1)	$ 342.3	$ 1,952.3	$ (1,312.8)

v3.24.2.u1

General Information	6 Months Ended
	Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General Information	Note 1 - General Information Borr Drilling Limited was incorporated in Bermuda on August 8, 2016. We are listed on the Oslo Stock Exchange ("OSE") and on the New York Stock Exchange ("NYSE") under the ticker "BORR". Borr Drilling Limited is an international offshore drilling contractor providing services to the oil and gas industry. Our primary business is the ownership, contracting and operation of modern jack-up drilling rigs for operations in shallow-water areas (i.e., in water depths up to approximately 400 feet), including the provision of related equipment and work crews to conduct drilling of oil and gas wells and workover operations for exploration and production customers. As of June 30, 2024, we had 22 premium jack-up rigs and had agreed to purchase two additional premium jack-up rigs under construction which are scheduled for delivery in the second half of 2024. As used herein, and unless otherwise required by the context, the terms “Company,” “Borr”, “we,” “Group,” “our” and words of similar nature refer to Borr Drilling Limited and its consolidated companies. The use herein of such terms as “group”, “organization”, “we”, “us”, “our” and “its”, or references to specific entities, is not intended to be a precise description of corporate relationships.

v3.24.2.u1

Basis of Preparation and Accounting Policies	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Preparation and Accounting Policies	Note 2 - Basis of Preparation and Accounting Policies Basis of preparation The unaudited consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). The unaudited consolidated financial statements do not include all of the disclosures required under U.S. GAAP in the annual consolidated financial statements, and should be read in conjunction with our audited annual financial statements for the year ended December 31, 2023, which are included in our annual report on Form 20-F for the fiscal year ended December 31, 2023, filed with the Securities and Exchange Commission on March 27, 2024. The Consolidated Balance Sheet data as of December 31, 2023 was derived from our audited annual financial statements. The amounts are presented in millions of United States dollars ("U.S. dollar" or "$"), unless otherwise stated. The financial statements have been prepared on a going concern basis and in management's opinion, all adjustments necessary for a fair presentation of the financial statements are reflected in the interim periods presented. Significant accounting policies The accounting policies adopted in the preparation of the unaudited condensed consolidated financial statements for the six months ended June 30, 2024 are consistent with those followed in preparation of our annual audited consolidated financial statements for the year ended December 31, 2023, except for the revenue and marketable equity securities accounting policies. During the six months ended June 30, 2024, the revenue accounting policy was updated as a result of the execution of bareboat charter agreements and operating and maintenance agreements with third-parties and the marketable equity securities accounting policy was included as a result of the Company's investment in equity securities. Revenue The Company performs services that represent a single performance obligation under its drilling contracts. This performance obligation is satisfied over time. The Company earns revenues primarily by performing the following activities: (i) providing the drilling rig, work crews, related equipment and services necessary to operate the rig (ii) delivering the drilling rig by mobilizing to and demobilizing from the drilling location, and (iii) performing certain pre-operating activities, including rig preparation activities or equipment modifications required for the contract. The Company recognizes revenues earned under drilling contracts based on variable dayrates, which range from full operating dayrates to lower rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has operating dayrates that change over the firm term of the contract. Such dayrate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes revenues earned in relation to contract management agreements where we provide rig operational and maintenance support services to third parties based either on a cost-plus or dayrate basis. Such consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes revenues earned in relation to certain bareboat charter agreements where we lease our owned rigs to third parties based on fixed daily rates, which range from operating rates to stand-by rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has fixed daily rates that change over the firm term of the contract. Such fixed daily rate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes reimbursement revenues and the corresponding costs, gross, at a point in time, as the Company provides the customer-requested goods and services, when such reimbursable costs are incurred while performing drilling operations. Reimbursable revenues are recognized in 'Dayrate revenue' in the Unaudited Condensed Consolidated Statements of Operations. Prior to performing drilling operations, the Company may receive pre-operating revenues, on either a fixed lump-sum or variable dayrate basis, for mobilization, contract preparation, customer-requested goods and services or capital upgrades or other upfront payments, which the Company recognizes over time in line with the satisfaction of the performance obligation. These activities are not considered to be distinct within the context of the contract and therefore, the associated revenue is allocated to the overall performance obligation and recognized ratably over the expected term of the related drilling contract. We record a contract liability for mobilization fees received, which is amortized ratably to dayrate revenue as services are rendered over the initial term of the related drilling contract. We may receive fees (on either a fixed lump-sum or variable dayrate basis) for the demobilization of our rigs. Demobilization revenue expected to be received upon contract completion is estimated as part of the overall transaction price at contract inception and recognized over the term of the contract. In most of our contracts, there is uncertainty as to the likelihood and amount of expected demobilization revenue to be received as the amount may vary dependent upon whether or not the rig has additional contracted work following the contract. Therefore, the estimate for such revenue may be constrained, depending on the facts and circumstances pertaining to the specific contract. We assess the likelihood of receiving such revenue based on past experience and knowledge of the market conditions. Investment in marketable equity securities Investment in marketable equity securities with readily determinable fair values are measured at fair value each reporting period with the related gains and losses, including unrealized, recognized in “Other financial expenses, net” in the Unaudited Condensed Consolidated Statements of Operations. We classify our investment in marketable equity securities as current assets because the securities are available to be sold to meet liquidity needs if necessary, even if it is not the intention to dispose of the securities in the next twelve months. Use of estimates The preparation of financial statements in accordance with U.S. GAAP requires that management make estimates and assumptions affecting the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

v3.24.2.u1

Recently Issued Accounting Standards	6 Months Ended
	Jun. 30, 2024
Accounting Changes and Error Corrections [Abstract]
Recently Issued Accounting Standards	Note 3 - Recently Issued Accounting Standards Adoption of new accounting standards In June 2022, the Financial Accounting Standards Board ("FASB") issued ASU 2022-03 Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The amendments clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments also clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction and require the following disclosures for equity securities subject to contractual sale restrictions: 1) The fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; 2) The nature and remaining duration of the restriction(s) and 3) The circumstances that could cause a lapse in the restriction(s). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In March 2023, the FASB issued ASU 2023-01 Leases (Topic 842): Common Control Arrangements. The amendments provide a practical expedient for private companies and not-for-profit entities that are not conduit bond obligors to use the written terms and conditions of a common control arrangement to determine whether a lease exists and, if so, the classification of and accounting for that lease. If no written terms and conditions exist (including in situations in which an entity does not document existing unwritten terms and conditions in writing upon transition to the practical expedient), an entity is prohibited from applying the practical expedient and must evaluate the enforceable terms and conditions to apply Topic 842. Also, the amendments require that leasehold improvements associated with common control leases be: 1) Amortized by the lessee over the useful life of the leasehold improvements to the common control group (regardless of the lease term) as long as the lessee controls the use of the underlying asset (the leased asset) through a lease. However, if the lessor obtained the right to control the use of the underlying asset through a lease with another entity not within the same common control group, the amortization period may not exceed the amortization period of the common control group; 2) Accounted for as a transfer between entities under common control through an adjustment to equity (or net assets for not-for-profit entities) if, and when, the lessee no longer controls the use of the underlying asset. Additionally, those leasehold improvements are subject to the impairment guidance in Topic 360, Property, Plant, and Equipment. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In March 2023, the FASB issued ASU 2023-02 Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force). The amendments permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this Update improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update: 1) Require that a public entity disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the Chief Operating Decision Maker ("CODM") and included within each reported measure of segment profit or loss; 2) Require that a public entity disclose, on an annual and interim basis, an amount for other segment items by reportable segment and a description of its composition; 3) Require that a public entity provide all annual disclosures about a reportable segment’s profit or loss and assets currently required by Topic 280 in interim periods; 4) Clarify that if the CODM uses more than one measure of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources, a public entity may report one or more of those additional measures of segment profit. However, at least one of the reported segment profit or loss measures (or the single reported measure, if only one is disclosed) should be the measure that is most consistent with the measurement principles used in measuring the corresponding amounts in the public entity’s consolidated financial statements; 5) Require that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources; 6) Require that a public entity that has a single reportable segment provide all the disclosures required by the amendments in this Update and all existing segment disclosures in Topic 280. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements and no material impact on our related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. Accounting pronouncements that have been issued but not yet adopted Standard Description Date of Adoption Effect on our Consolidated Financial Statements or Other Significant Matters ASU 2023-05 Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement The amendments in this Update address the accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The objectives of the amendments are to: (1) provide decision-useful information to investors and other allocators of capital (collectively, investors) in a joint venture’s financial statements; and (2) reduce diversity in practice. To reduce diversity in practice and provide decision-useful information to a joint venture’s investors, the Board decided to require that a joint venture apply a new basis of accounting upon formation, resulting in a joint venture, upon formation, being required to recognize and initially measure its assets and liabilities at fair value (with exceptions to fair value measurement that are consistent with the business combinations guidance). January 1, 2025 Under evaluation ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures The amendments in this Update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). A public business entity is required to provide an explanation, if not otherwise evident, of the individual reconciling items disclosed, such as the nature, effect, and underlying causes of the reconciling items and the judgment used in categorizing the reconciling items. The other amendments in this Update improve the effectiveness and comparability of disclosures by (1) adding disclosures of pretax income (or loss) and income tax expense (or benefit) to be consistent with U.S. Securities and Exchange Commission (SEC) Regulation S-X 210.4-08(h), Rules of General Application—General Notes to Financial Statements: Income Tax Expense, and (2) removing disclosures that no longer are considered cost beneficial or relevant. January 1, 2025 Under evaluation ASU 2024-01: Compensation—Stock Compensation (Topic 718) The amendments in this Update improve GAAP by adding an illustrative example to demonstrate how an entity should apply the scope guidance in paragraph 718-10-15-3 to determine whether a profits interest award should be accounted for in accordance with Topic 718, Compensation—Stock Compensation. The fact patterns in the illustrative example focus on the scope conditions in paragraph 718-10-15-3. The illustrative example is intended to reduce (1) complexity in determining whether a profits interest award is subject to the guidance in Topic 718 and (2) existing diversity in practice. January 1, 2025 Under evaluation As of August 15, 2024, the FASB have issued further updates not included above. We do not currently expect any of these updates to have a material impact on our consolidated financial statements and related disclosures either on transition or in future periods.

v3.24.2.u1

Segment Information	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Segment Information	Note 4 - Segment Information During the three months ended June 30, 2024 and June 30, 2023, we had a single reportable segment: our operations performed under our dayrate model (which includes rig charters and ancillary services). Our CODM, our Board of Directors, reviews financial information provided as an aggregate sum of assets, liabilities and activities that exist to generate cash flows, by our single operating segment. Given that we only have a single reportable segment, allocation of resources by our CODM is not determined by segment profit or loss. The following presents financial information by segment for the three months ended June 30, 2024: Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 226.9 (3.9) 223.0 Bareboat charter revenue 26.6 — 26.6 Management contract revenue 35.1 (23.4) 11.7 Related party revenue — 10.6 10.6 Gain on disposal — 0.2 0.2 Rig operating and maintenance expenses (151.0) 26.9 (124.1) Depreciation of non-current assets (1) (31.5) (0.4) (31.9) General and administrative expenses (1) — (11.6) (11.6) Loss from equity method investments — (2.5) (2.5) Operating income including equity method investments 106.1 (4.1) 102.0 Total assets 3,434.2 (252.6) 3,181.6 The following presents financial information by segment for the three months ended June 30, 2023: (in $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 236.9 (81.8) 155.1 Related party revenue — 32.4 32.4 Gain on disposal — 0.2 0.2 Rig operating and maintenance expenses (169.7) 80.2 (89.5) Depreciation of non-current assets (1) (27.6) (0.4) (28.0) General and administrative expenses (1) — (10.3) (10.3) Income from equity method investments — 3.9 3.9 Operating income including equity method investments 39.6 24.2 63.8 Total assets 3,276.9 (280.8) 2,996.1 The following presents financial information by segment for the six months ended June 30, 2024: (In $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 460.9 (39.6) 421.3 Bareboat charter revenue 37.9 — 37.9 Management contract revenue 54.5 (42.8) 11.7 Related party revenue — 35.0 35.0 Gain on disposal — 0.4 0.4 Rig operating and maintenance expenses (309.3) 81.2 (228.1) Depreciation of non-current assets (1) (63.0) (0.7) (63.7) General and administrative expenses(1) — (25.0) (25.0) Income from equity method investments — 2.9 2.9 Operating income including equity method investments 181.0 11.4 192.4 The following presents financial information by segment for the six months ended June 30, 2023: (In $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 454.7 (157.9) 296.8 Related party revenue — 62.7 62.7 Gain on disposal — 0.3 0.3 Rig operating and maintenance expenses (329.7) 154.7 (175.0) Depreciation of non-current assets (1) (55.4) (0.8) (56.2) General and administrative expenses(1) — (22.7) (22.7) Income from equity method investments — 6.3 6.3 Operating income including equity method investments 69.6 42.6 112.2 (1) General and administrative expenses and depreciation expense incurred by our corporate office are not allocated to our operating segment for purposes of measuring segment operating income / (loss) and are included in "Reconciling items." (2) The full operating results included above for our equity method investments are not included within our consolidated results and thus are deducted under "Reconciling items" and replaced with our income / (loss) from equity method investments (see Note 6 - Equity Method Investments). Geographic data Revenues are attributed to geographical location based on the country of operations for drilling activities, and thus the country where the revenues are generated. The following presents our revenues by geographic area: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Mexico 80.3  43.0  146.5  82.5  South East Asia 74.4  58.5  138.5  110.4  Middle East 67.8  31.6  129.3  62.2  West Africa 41.3  45.9  76.7  89.3  Europe 8.1  8.5  14.9  15.1  Total 271.9  187.5  505.9  359.5  Major customers The following customers accounted for more than 10% of our dayrate and related party revenues: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In % of operating revenues) Saudi Arabian Oil Company 16  % 13  % 16  % 13  % PTT Exploration and Production Public Company Limited 12  % 9  % 10  % 9  % ENI Congo S.A. 11  % 14  % 11  % 14  % Perfomex 4  % 17  % 7  % 18  % Total 43  % 53  % 44  % 54  % Fixed Assets — Jack-up rigs (1) The following presents the net book value of our jack-up rigs by geographic area: June 30, 2024 December 31, 2023 (In $ millions) Mexico 803.7  815.4  South East Asia 664.7  673.4  Middle East 542.5  553.0  West Africa 437.8  444.8  Europe 89.8  91.7  Total 2,538.5  2,578.3  (1) The fixed assets referred to in the table above exclude assets under construction. Asset locations at the end of a period are not necessarily indicative of the geographical distribution of the revenues or operating profits generated by such assets during the associated periods.

v3.24.2.u1

Contracts with Customers	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Contracts with Customers	Note 5 - Contracts with Customers Contract Assets and Liabilities When the right to consideration becomes unconditional based on the contractual billing schedule, accrued revenue is recognized. At the point that accrued revenue is billed, trade accounts receivable are recognized. Payment terms on invoice amounts are typically 30 days. Deferred mobilization, demobilization and contract preparation revenue includes revenues received for rig mobilization as well as preparation and upgrade activities, in addition to demobilization revenues expected to be received upon contract commencement and other lump-sum revenues relating to the firm periods of our contracts. These revenues are allocated to the overall performance obligation and recognized on a straight-line basis over the initial firm term of the contracts. The following presents our contract assets and liabilities from our contracts with customers: June 30, 2024 December 31, 2023 (In $ millions) Accrued revenue (1) 103.8  73.7  Current contract assets 103.8  73.7  Non-current accrued revenue (2) 2.6  2.3  Non-current contract asset 2.6  2.3  Total contract asset 106.4  76.0  Current deferred mobilization, demobilization and other revenue (33.4) (59.5) Current contract liability (33.4) (59.5) Non-current deferred mobilization, demobilization and other revenue (27.9) (56.6) Non-current contract liability (27.9) (56.6) Total contract liability (61.3) (116.1) (1) Accrued revenue includes $14.0 million ($7.3 million as of December 31, 2023) related to the current portion of deferred variable rate revenue, $2.7 million ($1.1 million as of December 31, 2023) pertaining to the current portion of deferred demobilization revenue, and $0.6 million ($1.2 million as of December 31, 2023) related to the current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023). (2) Non-current accrued revenue includes $2.5 million ($1.5 million as of December 31, 2023) pertaining to the non-current portion of deferred demobilization revenue, and $0.1 million ($0.8 million as of December 31, 2023) related to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023). Non-current accrued revenue is included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets) Total movement in our contract assets and contract liabilities balances during the six months ended June 30, 2024 are as follows: (In $ millions) Contract assets Contract liabilities Balance as of December 31, 2023 76.0  116.1  Performance obligations satisfied during the reporting period 94.2  —  Amortization of revenue —  (68.7) Unbilled demobilization revenue 2.6  —  Unbilled variable rate revenue 6.7  —  Performance obligations to be satisfied over time —  2.6  Unbilled mobilization revenue 0.6  —  Cash received, excluding amounts recognized as revenue —  11.3  Cash received against the contract asset balance (73.7) —  Balance as of June 30, 2024 106.4  61.3  Timing of Revenue The Company derives its revenue from contracts with customers for the transfer of goods and services, from various activities performed both at a point in time and over time, under the output method. Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Over time 264.4  180.2  492.7  347.1  Point in time 7.5  7.3  13.2  12.4  Total 271.9  187.5  505.9  359.5  Revenue on existing contracts, where performance obligations are unsatisfied or partially unsatisfied at the balance sheet date, is expected to be recognized as follows as at June 30, 2024: For the periods ending June 30, (In $ millions) 2025 2026 2027 2028 onwards Dayrate revenue 913.9  411.4  65.2  58.5  Other revenue (1) 72.7  36.1  6.7  7.0  Total 986.6  447.5  71.9  65.5  (1) Other revenue represents lump sum revenue associated with contract preparation and mobilization and is recognized ratably over the initial firm term of the associated contract in "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations. Contract Costs Deferred mobilization and contract preparation costs relate to costs incurred to prepare a rig for contract and delivery or to mobilize a rig to the drilling location. We defer pre‑operating costs, such as contract preparation and mobilization costs, and recognize such costs on a straight‑line basis, over the estimated firm period of the drilling contract. Costs incurred for the demobilization of rigs at contract completion are recognized as incurred during the demobilization period. June 30, 2024 December 31, 2023 (In $ millions) Current deferred mobilization and contract preparation costs 31.8  39.4  Non-current deferred mobilization and contract preparation costs (1) 31.6  42.6  Total deferred mobilization and contract preparation asset 63.4  82.0  (1) Non-current deferred mobilization and contract preparation costs are included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets). Deferred mobilization and contract preparation costs decreased by $18.6 million during the six months ended June 30, 2024 to $63.4 million, from $82.0 million as of December 31, 2023 as a result of additional deferred costs of $13.2 million primarily relating to the contract preparations of the rigs "Hild", "Idun", "Thor" and "Ran", offset by amortization of $31.8 million during the six months ended June 30, 2024.

v3.24.2.u1

Equity Method Investments	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Note 6 - Equity Method Investments We own a 51% interest in two Mexico-based joint ventures, Perfomex and Perfomex II. We previously provided five jack-up rigs on bareboat charters to these joint ventures. These joint ventures previously provided dayrate drilling services to Opex Perforadora S.A. de C.V. (“Opex”) and Perforadora Profesional AKAL I, SA de CV (“Akal”), which both provide integrated well services to Petróleos Mexicanos (“Pemex”). Opex and Akal are wholly owned by Operadora Productora y Exploradora Mexicana, S.A. de C.V. (“Operadora”), a fully owned subsidiary of Proyectos Globales de Energia y Servicos CME, S.A. DE C.V. (“CME”). CME owns the remaining 49% interest in our joint ventures Perfomex and Perfomex II. Effective January 1, 2024, Perfomex and Opex agreed to terminate the Drilling and Technical Services Agreements ("DTSAs") for the jack-up rigs "Grid" and "Gersemi" which triggered a termination fee payable by Opex to Perfomex of $14 million, or $7 million per Borr jack-up rig operated by Perfomex. Effective April 1, 2024, Perfomex and Opex agreed to terminate the Drilling and Technical Services Agreements ("DTSAs") for the jack-up rigs "Galar", "Odin" and "Njord" which triggered a further termination fee payable by Opex to Perfomex of $21 million, or $7 million per Borr jack-up rig. The associated bareboat charter agreements between Perfomex and the Company were also terminated. Effective the same dates as the termination dates referenced above, the Company entered into new fixed rate bareboat charter agreements for the jack-up rigs "Grid", "Gersemi", "Galar", "Odin" and "Njord" with Irish Energy Drilling Assets, DAC ("Irco"). The new bareboat charter agreements remain in effect until December 31, 2025. In addition, effective January 1, 2024, Perfomex entered into new Drilling, Operation and Management Agreements ("DO&M Agreements") with Perforadora Ircomex, S.A. DE C.V. ("Ircomex") to provide drilling, operations and management services for the Borr jack-up rigs "Grid" and "Gersemi", plus third-party owned jack-up rigs "CME I" and "CME II". Effective April 1, 2024, DO&M Agreements were also entered into by Borr Drilling Contracting S. de R.L. de C.V., a wholly owned subsidiary of the Company, with Ircomex, to provide drilling, operations and management services for the Borr jack-up rigs "Galar", "Odin" and "Njord". These DO&M Agreements are based on a cost-plus pricing model and remain in effect until December 31, 2025. Irco and Ircomex will continue to provide the jack-up rigs "Grid","Gersemi","Galar", "Odin" and "Njord" and accompanying operational services to Opex, to service its integrated well services contract with Pemex. The below tables set forth the results from these entities, on a 100% basis, for the three months ended June 30, 2024 and 2023: Three months ended June 30, 2024 Three months ended June 30, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Revenue 24.5 2.8 72.4 9.4 Operating expenses (24.0) (2.9) (71.6) (8.6) Net income (2.7) (2.1) 6.0 1.6 The below tables set forth the results from these entities, on a 100% basis, for the six months ended June 30, 2024 and 2023: Six months ended June 30, 2024 Six months ended June 30, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Revenue 77.6 4.8 142.9 15.0 Operating expenses (76.4) (4.8) (140.0) (14.7) Net income / (loss) 7.4 (1.7) 10.1 2.2 As of June 30, 2024, Perfomex and Perfomex II had $95.7 million of receivables from Opex and Akal, of which $89.8 million was outstanding and $5.9 million was unbilled. As of December 31, 2023, Perfomex and Perfomex II had $164.9 million of receivables from Opex and Akal, of which $131.7 million was outstanding and $33.2 million was unbilled. Summarized balance sheets, on a 100% basis of the Company's equity method investees are as follows: As at June 30, 2024 As at December 31, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Cash and restricted cash (1) 3.0 — 11.4 0.5 Total current assets 196.5 33.4 271.4 35.1 Total non-current assets 20.7 2.0 12.3 2.1 Total assets 217.2 35.4 283.7 37.2 Total current liabilities 191.6 23.6 257.2 23.8 Total non-current liabilities — 0.4 8.3 0.2 Equity 25.6 11.4 18.2 13.2 Total Liabilities and Equity 217.2 35.4 283.7 37.2 (1) As of June 30, 2024, Perfomex had restricted cash of $2.4 million. The following presents our investments in equity method investments as at June 30, 2024: In $ millions Perfomex Perfomex II Borr Total Balance as of December 31, 2023 9.1  6.6  15.7  Income on a percentage basis 3.8  (0.9) 2.9  Balance as of June 30, 2024 12.9  5.7  18.6

v3.24.2.u1

Interest Expense	6 Months Ended
	Jun. 30, 2024
Other Income and Expenses [Abstract]
Interest Expense	Note 7 - Interest Expense Interest expense is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Debt interest expense (47.7) (38.4) (92.4) (75.2) Amortization of deferred finance charges (2.8) (3.2) (5.5) (5.0) Amortization of debt discount (1.7) —  (3.4) —  Amortization of debt premium 0.2  —  0.3  —  Total (52.0) (41.6) (101.0) (80.2)

v3.24.2.u1

Other Financial Expenses, Net	6 Months Ended
	Jun. 30, 2024
Other Income and Expenses [Abstract]
Other Financial Expenses, net	Other financial expenses, net is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Yard cost cover expense (5.6) (5.4) (11.2) (10.9) Bank commitment, guarantee and other fees (0.9) (0.8) (1.9) (1.2) Foreign exchange loss (0.2) (3.2) (2.3) (1.6) Other financial income / (expenses) (1) 0.6  (0.3) (0.9) (0.3) Unrealized changes in value of financial instruments 0.3  —  0.3  —  Total (5.8) (9.7) (16.0) (14.0) (1) Other financial expense for the six months ended June 30, 2024 includes $2.3 million of premium paid related to the Convertible Bonds repurchased in March 2024. Amortization of deferred finance charges for the three months ended June 30, 2023 of $3.2 million and for the six months ended June 30, 2023 of $5.0 million have been presented in Interest expense in the Unaudited Condensed Consolidated Statements of Operations, to conform to the current period's presentation. See Note 7 - Interest Expense.

v3.24.2.u1

Taxation	6 Months Ended
	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Taxation	Note 9 - Taxation Borr Drilling Limited is a Bermuda company and is currently not required to pay taxes in Bermuda on ordinary income or capital gains under a tax exemption granted by the Minister of Finance in Bermuda until March 31, 2035. In December 2023, the Bermuda Corporate Income Tax Act was enacted and will apply from January 1, 2025, with a statutory rate of 15%. We operate through various subsidiaries, affiliates and branches in numerous countries throughout the world and are subject to tax laws, policies, treaties and regulations, as well as the interpretation or enforcement thereof, in jurisdictions in which we or any of our subsidiaries, affiliates and branches operate, were incorporated, or are otherwise considered to have a tax presence. Our income tax expense is based upon our interpretation of the tax laws in effect in various countries at the time that the expense was incurred. Total pre-tax income / (loss) is comprised of the following by jurisdiction: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Bermuda (7.1) (15.4) (49.2) (30.0) Foreign 53.7  29.6  128.4  52.1  Total 46.6  14.2  79.2  22.1  The change in the effective tax rate from period to period is primarily attributable to changes in the profitability or loss mix of our operations in various jurisdictions. As our operations continually change among numerous jurisdictions and methods of taxation in these jurisdictions vary greatly, there is little direct correlation between the income tax provision or benefit and income or loss before taxes. We used a discrete effective tax rate method to calculate income taxes. Income tax (expense) / benefit is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Current tax (13.6) (12.5) (28.7) (27.9) Change in deferred tax (1.3) (0.9) (4.4) (0.8) Total (14.9) (13.4) (33.1) (28.7) The deferred tax assets related to our net operating losses were primarily generated in the United Kingdom and will not expire. We recognize a valuation allowance for deferred tax assets when it is more likely than not that the benefit from the deferred tax asset will not be realized. The amount of deferred tax assets considered realizable could increase or decrease in the near term if estimates of future taxable income change. In response to the Organization for Economic Co-Operation and Development (OECD) Base Erosion and Profit Shifting initiative, a 15% worldwide minimum tax implemented on a country-by-country basis has been introduced with many jurisdictions committed to a January 1, 2024, effective date. There remain a number of uncertainties around the final Pillar 2 model rules, and we are closely monitoring developments on this initiative. Additionally, on December 27, 2023, Bermuda enacted the Corporate Income Tax Act which imposes a 15% tax on Bermuda businesses that are part of multinational enterprise (MNE) groups. The effective date of the income tax is for tax years beginning on or after January 1, 2025. We are actively monitoring the evolving developments of these regulations and evaluating their potential impact on future periods. At present, we expect that they will not have a substantial impact on our financial results in the short term.

v3.24.2.u1

Income/(loss) Per Share	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Income/(loss) Per Share	Note 10 - Income/(loss) Per Share The computation of basic income/(loss) per share (“EPS”) is based on the weighted average number of shares outstanding during the period. Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Basic income (loss) per share 0.13 —  0.18  (0.03) Diluted income (loss) per share 0.12 —  0.18  (0.03) Issued ordinary shares at the end of the period 264,080,391 254,263,598 264,080,391 254,263,598 Net income / (loss) - basic 31.7 0.8 46.1 (6.6) Convertible bond interest using the if converted method 3.0 —  6.0 —  Net income/(loss) - diluted 34.7 0.8 52.1 (6.6) Weighted average numbers of shares outstanding for the period, basic 251,189,331 244,777,228 251,953,928 239,806,937 Dilutive effect of share options, RSU and Convertible Bond(1) 37,247,299  4,142,478  37,395,409  —  Weighted average numbers of shares outstanding for the period, diluted 288,436,630 248,919,706 289,349,337 239,806,937 (1) For the three and six months ended June 30, 2024, 8,118,362 share options and 862,780 restricted stock units using the treasury stock method and 33,554,319 shares issuable upon exercise of our convertible bonds due in May 2028 with a conversion price of $7.1347 per share, have been included as they are dilutive. For the three months ended June 30, 2023, 9,028,584 share options and 88,584 restricted stock units using the treasury stock method, have been included as they are dilutive. The weighted average number of shares outstanding includes 12,081,900 and 14,443,270 shares as of June 30. 2024 and December 31, 2023 shares, respectfully, which have been issued as part of a share lending arrangement relating to the Company's issuance of $250.0 million Convertible Bonds in 2023 (see Note 22 - Common Shares). The following potential share issuances effects of Convertible Bonds, share options, RSUs and performance units have been excluded from the calculation of diluted EPS for each of the periods presented because the effects were anti-dilutive. Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Convertible bonds —  34,027,031  —  34,027,031  Share options 2,100,000  280,000  2,100,000  9,220,000  Performance stock units 750,000  500,000  750,000  500,000  Restricted share units —  —  —  88,584  For the three and six months ended June 30, 2024, the impact of 2,100,000 stock options and 750,000 performance share units using the treasury stock method were anti-dilutive, as the exercise price was higher than the average share price, and therefore have been excluded from the calculation. For the three months ended June 30, 2023, the impact of 280,000 stock options and 500,000 performance share units using the treasury stock method were anti-dilutive, as the exercise price was higher than the average share price, and therefore have been excluded from the calculation. In addition, 34,027,031 shares issuable upon exercise of our convertible bonds due in May 2028 with a conversion price of $7.3471 per share, have been excluded as they are anti-dilutive. Diluted EPS for the six months ended June 30, 2023 does not include the effect of the assumed conversion of potentially dilutive instruments listed above, due to loss sustained in this period as this was deemed to have an anti-dilutive effect on our EPS.

v3.24.2.u1

Other Current Assets	6 Months Ended
	Jun. 30, 2024
Other Current Assets [Abstract]
Other Current Assets	Note 11 - Other Current Assets Other current assets are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) VAT receivable 8.0  16.5  Client rechargeables 5.2  5.3  Other tax receivables 5.6  4.7  Investment in marketable securities (1) 1.8  —  Right-of-use lease asset (2) 0.5  0.5  Deferred financing fee 0.5  0.5  Other receivables 3.2  4.5  Total 24.8  32.0  (1) Investment in marketable equity securities relates to shares purchased in another listed entity. Unrealized gains for the three months ended June 30, 2024 and for the six months ended June 30, 2024 were $0.3 million (nil for the three and six months ended June 30, 2023). See Note 8 - Other Financial Expenses, net. In July 2024, we sold the shares and we no longer hold any investment in marketable equity securities. (2) The right-of-use lease asset pertains to our office and yard leases.

v3.24.2.u1

Newbuildings	6 Months Ended
	Jun. 30, 2024
New buildings [Abstract]
Newbuildings	Note 12 - Newbuildings The table below sets forth the carrying value of our newbuildings: June 30, 2024 December 31, 2023 (In $ millions) Opening balance 5.4  3.5  Additions 18.0  1.9  Total 23.4  5.4  No rigs were delivered in the six months ended June 30, 2024. Impairment During the six months ended June 30, 2024, we considered whether indicators existed that the carrying amounts of our newbuildings may not be recoverable as of June 30, 2024, and concluded that no indicators, events, or changes in circumstances, have occurred to warrant a change in the assumptions utilized in the December 31, 2023 impairment tests of our newbuilding jack-up rig fleet. We will continue to monitor developments in the markets in which we operate for indications that the carrying values of our long-lived assets are not recoverable. Commitments The remaining contracted installments as of June 30, 2024 and December 31, 2023, payable on delivery, for the two Keppel newbuilds ordered in 2017, are in total $319.8 million, respectively (see Note 19 - Commitments and Contingencies).

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Jack-Up Rigs	6 Months Ended
	Jun. 30, 2024
Jack Up Rigs [Abstract]
Jack-Up Rigs	Note 13 - Jack-Up Rigs Set forth below is the carrying value of our jack-up rigs: June 30, 2024 December 31, 2023 (In $ millions) Opening balance 2,578.3  2,589.1  Additions 23.3  104.7  Depreciation and amortization (63.1) (115.5) Total 2,538.5  2,578.3  Accumulated depreciation related to jack-up rigs as at June 30, 2024 is $661.2 million (as at December 31, 2023 was $598.1 million). Depreciation of property, plant and equipment In addition to the depreciation in the above table, the Company recognized depreciation of $0.3 million and $0.6 million for the three and six months ended June 30, 2024 related to property, plant and equipment ($0.4 million and $0.8 million for the three and six months ended June 30, 2023). Impairment During the six months ended June 30, 2024, we considered whether indicators of impairment existed that could indicate that the carrying amounts of our jack-up rigs may not be recoverable as of June 30, 2024, and concluded that no such events or changes in circumstances have occurred to warrant a change in the assumptions utilized in the December 31, 2023 impairment tests of our jack-up rig fleet. We will continue to monitor developments in the markets in which we operate for indications that the carrying values of our long-lived assets are not recoverable.

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Leases	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Leases	Note 14 - Leases We have various operating leases, principally for office space, storage facilities and operating equipment, which expire at various dates. Supplemental balance sheet information related to leases is as follows: (In $ millions) June 30, 2024 December 31, 2023 Operating leases right-of-use assets 1.4  1.6  Current operating lease liabilities 0.5  0.5  Non-current operating lease liabilities 0.9  1.1  The current portion of the right-of-use assets of $0.5 million is recognized within "Other current assets" (see Note 11 - Other Current Assets) and the non-current portion of the right-of-use assets of $0.9 million is recognized within "Other non-current assets" (see Note 15 - Other Non-Current Assets) in the Unaudited Condensed Consolidated Balance Sheets. The current operating lease liabilities are recognized within "Other current liabilities" (see Note 17 - Other Current Liabilities) and the non-current operating lease liabilities are recognized within "Other non-current liabilities" in the Unaudited Condensed Consolidated Balance Sheets. Components of lease expenses are comprised of the following: (In $ millions) Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Rig operating and maintenance expenses 3.3  2.6  6.3  4.9  General and administrative expenses 0.5  0.3  1.0  0.9  Operating lease expense 3.8  2.9  7.3  5.8  Rental income Effective January 1, 2024, as part of a restructuring of our operations under our joint venture in Mexico, the Company entered into new fixed external bareboat charter agreements for two jack-up rigs and effective April 1, 2024 we entered into further fixed external bareboat charter agreements for three jack-up rigs, which continue to service Opex's contract with Pemex (see Note 6 - Equity Method Investments). Future revenues are based on a blended rate, in line with our revenue recognition policy, as the contract includes daily rates that change over the firm term of the contract. Revenues from operating leases for the three and six months ended June 30, 2024 of $26.6 million and $37.9 million have been recognized on a straight-line basis as “Bareboat charter revenue” in the Unaudited Condensed Consolidated Statements of Operations. There were nil revenues from operating leases for the three and six months ended June 30, 2023. The minimum future revenues to be received under the Company's operating leases on its jack-up rigs as of June 30, 2024, are as follows: (In $ millions) 2024 53.9  2025 106.9  Total minimum contractual future revenues 160.8  The cost and accumulated depreciation of jack-up rigs leased to third parties as of June 30, 2024 were $746.1 million and $160.1 million, respectively. There were no jack-up rigs leased to third parties as of December 31, 2023.

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Other Non-Current Assets	6 Months Ended
	Jun. 30, 2024
Other Assets, Noncurrent Disclosure [Abstract]
Other Non-Current Assets	Note 15 - Other Non-Current Assets Other long-term assets are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) Deferred mobilization and contract preparation costs (1) 31.6  42.6  Deferred tax asset 14.9  19.3  Deferred demobilization revenue (2) 2.5  1.5  Deferred financing fee 1.5  1.7  Right-of-use lease asset, non-current (3) 0.9  1.1  Liquidated damages (4) 0.1  0.8  Prepayments 0.1  0.3  Total 51.6  67.3  (1) Non-current deferred mobilization and contract preparation costs relate to the non-current portion of contract mobilization and preparation costs for five of our jack-up rigs (see Note 5 - Contracts with Customers). (2) Non-current deferred demobilization revenue relates to demobilization revenue for two of our jack-up rigs, which will be billed upon contract completion. (3) The right-of-use lease asset pertains to our offices and yard leases. (4) Relates to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two contracts as at December 31, 2023), which is amortized over the firm contract terms and recognized as reduction of "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations.

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Accrued Expenses	6 Months Ended
	Jun. 30, 2024
Payables and Accruals [Abstract]
Accrued Expenses	Note 16 - Accrued Expenses Accrued expenses are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) Accrued goods and services received, not invoiced 18.2  19.7  Accrued payroll and bonus 10.6  12.3  Other accrued expenses (1) 40.9  45.0  Total 69.7  77.0  (1) Other accrued expenses include holding costs incurred with the shipyards, professional fees, management fees and other accrued expenses related to rig operations.

v3.24.2.u1

Other Current Liabilities	6 Months Ended
	Jun. 30, 2024
Other Liabilities, Current [Abstract]
Other Current Liabilities	Note 17 - Other Current Liabilities Other current liabilities are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) VAT payable 21.0  17.5  Other current taxes payable (1) 20.0  19.7  Corporate income taxes payable 6.6  6.7  Accrued payroll and severance 1.2  0.8  Operating lease liability, current 0.5  0.5  Dividends payable (2) —  11.9  Other current liabilities 3.3  6.1  Total 52.6  63.2  (1) Other current taxes payable include withholding tax, payroll tax and other indirect tax related liabilities. (2) On December 22, 2023, the Company declared a cash distribution of $0.05 per share, corresponding to a total of $11.9 million, which was paid to our shareholders on January 22, 2024.

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Debt	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Debt	Note 18 - Debt Short-term debt is comprised of the following: Principal Amount (In $ millions) June 30, 2024 December 31, 2023 2028 Notes 75.0  75.0  2030 Notes 25.0  25.0  Additional 2028 Notes 14.6  —  Principal Outstanding 114.6  100.0  Deferred Finance Charges (1) (11.1) (10.3) Debt discount (6.8) (6.8) Debt premium 1.1  —  Carrying Value Short-Term Debt (2) 97.8  82.9  Long-term debt is comprised of the following: Principal Amount (In $ millions) June 30, 2024 December 31, 2023 2028 Notes 912.5  950.0  2030 Notes 477.5  490.0  Convertible Bonds 239.4  250.0  Additional 2028 Notes 178.0  —  Principal Outstanding 1,807.4  1,690.0  Deferred Finance Charges (1) (37.9) (40.5) Debt discount (27.3) (30.7) Debt premium 3.6  —  Carrying Value Long-Term Debt (2) 1,745.8  1,618.8  (1) As at June 30, 2024, deferred finance charges include the unamortized legal and bank fees associated with the 2028 Notes, Additional 2028 Notes, 2030 Notes, Convertible Bonds, our undrawn $150.0 million revolving credit facility as well as the unamortized debt issuance cost associated with the fair value of the Share Lending Agreement (see Note 22 - Common Shares). (2) Carrying amounts in the table above include, where applicable, deferred financing fees, debt discounts and debt premiums. At June 30, 2024 the scheduled maturities of our debt were as follows: Maturities (In $ millions) 2024 57.2  2025 114.6  2026 114.6  2027 114.6  Thereafter 1,521.0  Total principal debt 1,922.0  Issuance of Additional Senior Secured Notes Due 2028 On November 7, 2023, the Company's wholly owned subsidiary Borr IHC Limited, and certain other subsidiaries, issued $1,540.0 million in aggregate principal amount of senior secured notes, consisting of $1,025.0 million principal amount of senior secured notes due 2028 at a price equal to 97.750%, bearing a coupon of 10% per annum (the "2028 Notes"), and $515.0 million principal amount of senior secured notes due 2030 at a price equal to 97.000%, bearing a coupon of 10.375% per annum (the "2030 Notes"). The 2028 Notes mature on November 15, 2028 and the 2030 Notes mature on November 15, 2030, and interest on the 2028 Notes and 2030 Notes is payable on May 15 and November 15 of each year, beginning on May 15, 2024. In March 2024, the Company issued $200.0 million principal amount of additional senior secured notes due in 2028 (the "Additional 2028 Notes" and, together with the 2028 Notes and the 2030 Notes, the "Notes") under the same terms and conditions as the $1,025.0 million notes issued in November 2023. The Additional 2028 notes were issued at a price equal to 102.5% plus accrued interest, raising gross proceeds of $211.9 million. Repurchase of Unsecured Convertible Bonds due 2028 (Convertible Bonds) In February 2023, we issued $250.0 million of unsecured convertible bonds, which mature in February 2028. The initial conversion price was $7.3471 per share, convertible into 34,027,031 common shares. In March 2024 we repurchased $10.6 million of the Convertible Bonds at an average price of 120.88% of par for a total consideration of $12.9 million, inclusive of accrued interest, and recognized a loss in "Other financial expenses, net" of $2.3 million. Following the declaration and payment of a $0.05 per share cash distribution in each of January and March 2024 as well as a $0.10 per share cash distribution in May 2024, the adjusted conversion price is $7.13147 per share, with the current amount of convertible bonds convertible into 33,554,319 shares. The convertible bonds have a coupon of 5% per annum payable semi-annually in arrears in equal installments. The terms and conditions governing our convertible bonds contain customary events of default, including failure to pay any amount due on the bonds when due, and certain restrictions, including, among others, restrictions on disposal of assets and our ability to carry out any merger or corporate reorganization, subject to exceptions. Interest The weighted average nominal interest rate for all of our interest-bearing debt was 9.7% for the six months ended June 30, 2024 (8.9% for the six months ended June 30, 2023). Excluding our Convertible Bonds, the weighted average interest rate for our interest-bearing debt was 10.3% for the six months ended June 30, 2024 (10.3% for the six months ended June 30, 2023). Covenants As at June 30, 2024, we were in compliance with the covenants and our obligations under our debt agreements.

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Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 19 - Commitments and Contingencies The Company has the following delivery installment commitments: June 30, 2024 December 31, 2023 (in $ millions) Delivery installments for jack-up drilling rigs 319.8 319.8 Total 319.8 319.8 In September 2023, we entered into an agreement with Seatrium New Energy Limited to amend the Construction Contract for the Vali and the Var to expedite their delivery dates, on a best efforts basis only, to August 2024 and November 2024, respectively, in consideration for an additional payment of $12.5 million (acceleration costs) per rig on each respective delivery date. The following table sets forth when our delivery installment commitments fall due as of June 30, 2024, based upon best efforts expedited delivery dates: (In $ millions) Less than 1 year 1-2 years 2-3 years Thereafter Total Delivery installments for jack-up rigs 319.8  —  —  —  319.8  Other commercial commitments We have other commercial commitments which contractually obligate us to settle with cash under certain circumstances. Bank and parent company guarantees entered into between certain customers and governmental bodies guarantee our performance regarding certain drilling contracts, customs import duties and other obligations in various jurisdictions. The Company has the following guarantee commitments: June 30, 2024 December 31, 2023 (in $ millions) Bank guarantees, letters of credit and performance bonds 27.6  29.0  Total 27.6 29.0 As at June 30, 2024, the expected expiration dates of these obligations are as follows: (In $ millions) Less than 1 year 1–3 years Thereafter Total Bank guarantees and performance bonds 8.2  13.8  5.6  27.6  Assets pledged as collateral June 30, 2024 December 31, 2023 (in $ millions) Book value of jack-up rigs pledged as collateral for debt facilities 2,538.5  2,578.3

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Related Party Transactions	6 Months Ended
	Jun. 30, 2024
Related Party Transactions [Abstract]
Related Party Transactions	Note 20 - Related Party Transactions a) Transactions with entities over which we have significant influence We provided three rigs on a bareboat basis to Perfomex to service its contracts with Opex and two rigs on a bareboat basis to Perfomex II to service its contract with Akal. Perfomex and Perfomex II provided the jack-up rigs under traditional dayrate and technical service agreements ("DTSAs") to Opex and Akal, respectively. This structure enabled Opex and Akal to provide bundled integrated well services to Pemex. Effective October 20, 2022 until December 31, 2023, we provided all five rigs on a bareboat basis to Perfomex, to service its contracts with Opex. The bareboat revenue from these contracts is recognized as "Related party revenue" in the Unaudited Condensed Consolidated Statements of Operations. Effective January 1, 2024, Perfomex and Opex agreed to terminate the DTSAs for the jack-up rigs "Grid" and "Gersemi" and effective April 1, 2024, Perfomex and Opex agreed to terminate the DTSAs for the jack-up rigs "Galar", "Odin" and "Njord". The associated bareboat charter agreements between Perfomex and the Company were also terminated. Effective the same dates as the termination dates referenced above, the Company entered into new fixed rate bareboat charter agreements for the jack-up rigs with an unrelated party, which has agreed to provide the five rigs to service Opex's contract with Pemex. As such, effective April 1, 2024, we do not provide rigs on a bareboat basis to Perfomex (see Note 6 - Equity Method Investments and Note 14 - Leases). For the three and six months ended June 30, 2024 and 2023, the bareboat revenues from our related parties consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Bareboat Revenue - Perfomex 10.6  32.4 35.0 62.7 Total 10.6  32.4 35 62.7 The bareboat revenue for the three months ended June 30, 2024 consisted primarily of amortization of deferred revenue associated with the acceleration of amortization of the deferred performance fee associated with the jack-up rigs "Galar", "Odin" and "Njord" as a consequence of the termination of the bareboat charter agreements between Perfomex and the Company, effective April 1, 2024. For the three and six months ended June 30, 2024 and 2023, repayment of loans from our equity method investments consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Perfomex —  (9.8) —  (9.8) Total —  (9.8) —  (9.8) Receivables: The balances with the joint ventures as of June 30, 2024 and December 31, 2023 consisted of the following: June 30, 2024 December 31, 2023 (In $ millions) Perfomex 79.0  92.4 Perfomex II 0.4  2.6 Total 79.4 95.0 b) Transactions with Other Related Parties Expenses: The transactions with other related parties for six months ended June 30, 2024 and 2023 consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Magni Partners Limited (1) —  (0.1) —  (0.2) Drew Holdings Limited (2) —  (0.3) —  (1.0) Front End Limited Company (3) (0.8) (0.6) (2.2) (1.1) (1) Magni Partners Limited ("Magni") is a party to a Corporate Services Agreement with the Company, pursuant to which it provides strategic advice and assists in sourcing investment opportunities, financing and other such services as the Company wishes to engage, at the Company's option. There is both a fixed and variable element of the agreement, with the fixed cost element representing Magni's fixed costs and any variable element being at the Company's discretion. Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Magni. Effective January 1, 2024, the fixed element of the agreement was terminated, while the remaining terms of the agreement continue to remain in force. (2) Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Drew Holdings Limited ("Drew"). In January 2023 Drew entered into a Share Lending Framework Agreement ("SLFA") with the Company and DNB Markets for the purposes of facilitating investors’ hedging activities in connection with the Senior Unsecured Convertible bonds due 2028. In order to make the Company's shares available for lending, and only until a certain number of new shares were issued by the Company in connection with such lending arrangement, Drew made up to 15 million shares available to DNB Markets under the SLFA to facilitate such lending to the convertible bond investors requiring such hedging activities. Under the terms of the SLFA, the Company incurred fees payable to Drew for the shares available for lending. As at December 31, 2023, Drew is no longer a party to the SLA (see Note 22 - Common Shares). (3) Front End Limited Company ("Front End") owns 3% of Borr Arabia Well Drilling LLC, an entity that is consolidated by Borr Drilling Limited and incorporated in the Kingdom of Saudi Arabia (the "KSA"). Front End is a party to a Management Agreement with Borr Arabia Well Drilling LLC to provide management services in the KSA, for which it receives a management fee. In addition, in January 2023, the Company recognized $1.3 million payable to Magni under a Call-off Contract to cover direct costs related to assistance in relation to the Unsecured Convertible Bonds and Secured Bonds completed in February 2023 and in November 2023, the Company recognized $1.0 million payable to Magni under a Call-off Contract to cover direct costs related to assistance in relation to 2028 and 2030 Notes completed in November 2023. As these costs are directly attributable to the issuance of these bonds, these amounts were recognized as deferred finance charges, presented as a reduction to the carrying value of the associated facilities and are amortized over the term of the facilities as "Interest Expense" in the Unaudited Condensed Consolidated Statements of Operations.

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Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 21 - Fair Value of Financial Instruments We recognize our fair value estimates using a fair value hierarchy based on the inputs used to measure fair value. The fair value hierarchy has three levels based on reliability of inputs used to determine fair value as follows: Level 1: Quoted market prices in active markets for identical assets and liabilities. Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data The carrying value and estimated fair value of our financial instruments at June 30, 2024 and December 31, 2023 were as follows: As at June 30, 2024 As at December 31, 2023 (In $ millions) Hierarchy Fair value Carrying value Fair value Carrying value Assets Cash and cash equivalents (1) 1 193.5  193.5  102.5  102.5  Restricted cash (1) 1 1.0  1.0  0.1  0.1  Trade receivables (1) 1 99.1  99.1  56.2  56.2  Other current assets (excluding deferred costs) (1) 1 24.3  24.3  31.5  31.5  Due from related parties (1) 1 79.4  79.4  95.0  95.0  Liabilities Trade payables (1) 1 58.3  58.3  35.5  35.5  Accrued expenses (1) 1 69.7  69.7  77.0  77.0  Short term accrued interest and other items (1) 1 37.2  37.2  42.3  42.3  Other current liabilities (1) 1 52.6  52.6  63.2  63.2  Short-term debt (2) (3) 2 120.3  114.6  104.4  100.0  Long-term debt (2) (4) 2 1,927.6  1,807.4  1,818.0  1,690.0  (1) The carrying values approximate the fair values due to their near term expected receipt of cash. (2) Short term and long term debt excludes debt discounts, debt premiums and deferred finance charges. (3) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030. These are fair valued using observable market-based inputs. (4) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030 and our Convertible Bonds due 2028 These are fair valued using observable market-based inputs. Share Lending Agreement In addition, during the year ended December 31, 2023, the Company recognized a deferred finance charge in the amount of $12.4 million in relation to our Share Lending Framework Agreement ("SFLA"), which was fair valued using observable market-based inputs and is amortized over the term of the Convertible Bonds.

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Common Shares	6 Months Ended
	Jun. 30, 2024
Equity [Abstract]
Common Shares	Note 22 - Common Shares Authorized share capital June 30, 2024 December 31, 2023 (Number of shares of $0.10 each) Authorized shares 315,000,000  315,000,000  Issued and outstanding share capital June 30, 2024 December 31, 2023 (Number of shares of $0.10 each) Issued 264,080,391  264,080,391  Treasury shares 13,448,389  11,498,355  Outstanding 250,632,002  252,582,036  Share Lending Agreement In connection with the Convertible Bonds (see Note 18 - Debt), during 2023, the Company entered into a Share Lending Framework Agreement ("SLFA") with DNB Markets ("DNB") and Drew Holdings Limited ("Drew") with the intention of making up to 25.0 million common shares ("Issuer Lending Shares") available to lend to DNB for the purposes of allowing the holders of the New Convertible Bonds to perform hedging activities on the OSE. The SLFA contains a provision that the Issuer Lending Shares be available only for trading on the OSE. At the date of the execution of the SLFA, the Company did not have a sufficient number of common shares available for trading on the OSE and therefore began the process of issuing new shares and making them available for trading on the OSE by way of a listing prospectus (the “Prospectus Event”). The Company and Drew, a shareholder of the Company, separately entered into a Share Loan Agreement (“SLA”) in which Drew would make up to 15.0 million of its shares available to DNB (“Drew Shares”) until the Prospectus Event. During this period, the Company would lend to Drew 15.0 million of its shares that were not yet available for trading on the OSE. The Prospectus Event occurred on April 19, 2023, at which time Drew returned such shares back to Borr. In addition, DNB borrowed an equivalent amount of Drew Shares from Borr to redeliver these shares back to Drew (the “Settlement”). The "Loan Period" of the SLFA is defined as the earlier of (a) the date the SLFA is terminated (b) any date the convertible bonds are either redeemed or converted into the Company’s shares in full and (c) the maturity date of the convertible bond in 2028. At the expiration of the Loan Period, DNB must return all of the Issuer Lending Shares back to Borr. During the Loan Period, if an investor returns any lending share to DNB, DNB shall return such lending shares back to the Company immediately. The Company receives no proceeds from lending out the Issuer Lending Shares to DNB. DNB must charge each investor a lending fee of a maximum of 0.5% per annum in which for the first six months from the date of the SLFA, the Company agrees to compensate DNB so that the lending fee DNB receives in total will be 1.0% per annum. There is no compensation that the Company pays DNB for returning the Issuer Lending Shares to the Company. There is no unilateral mechanism given to either party in choosing to settle in cash except for a very limited scenario involving default. DNB is not required to provide collateral for borrowing the shares. There are no dividends paid to DNB as a result of lending out the Issuer Lending Shares. At issuance, the share lending agreement was accounted for under ASC 470-20 as a "Deferred Finance Charge" of the Convertible Bonds, with an offset to "Additional Paid in Capital" in the Unaudited Condensed Consolidated Balance Sheets. The share lending agreement was measured at a fair value in accordance with ASC 820 at inception and the Company recognized $12.4 million accordingly. As of June 30, 2024, the Company had loaned 12,081,900 shares in total to DNB for the purposes of allowing the holders of the New Convertible Bonds to perform hedging activities on the OSE. As of June 30, 2024, the unamortized amount of the issuance costs associated with the SLFA was $2.5 million ($2.5 million as at December 31, 2024) included in "Short-term debt" and $6.4 million ($7.6 million as at December 31, 2023) included in "Long-term debt" in our Unaudited Condensed Consolidated Balance Sheets. During the three and six months ended June 30, 2024 $0.6 million and $1.2 million of amortization of issuance costs associated with the SLFA was recognized in "Interest expense" in the Unaudited Condensed Consolidated Statements of Operations. During the three and six months ended June 30, 2023, $1.0 million and $1.0 million of amortization of issuance costs associated with the SLFA were recognized. Share option plan During the three months ended June 30, 2024, no share options were exercised. During the six months ended June 30, 2024, the Company issued 411,336 treasury shares following the exercise of 411,336 share options. Dividends On May 22, 2024, the Company declared a cash distribution of $0.10 per share, corresponding to a total of $23.9 million, which was paid to our shareholders on June 17, 2024. On February 22, 2024, the Company declared a cash distribution of $0.05 per share, corresponding to a total of $11.9 million, which was paid to our shareholders on March 18, 2024.

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Subsequent Events	6 Months Ended
	Jun. 30, 2024
Subsequent Events [Abstract]
Subsequent Events	Note 23 - Subsequent Events In November 2023, the Company entered into a $180 million Super Senior Credit Facility, comprised of a $150 million RCF and a $30.0 million Guarantee Facility. In August 2024, the Company amended the $30.0 million Guarantee Facility increasing the Guarantee Facility to $45.0 million and the total facility to $195.0 million. In August 2024, we issued $150.0 million principal amount of additional 10% Senior Secured Notes due in 2028 under the same terms and conditions as the $1,025.0 million Senior Secured Notes due 2028 issued in November 2023 and the additional $200.0 million issued in March 2024. On August 14, 2024, the Company declared a cash distribution of $0.10 per share, which is expected to be paid to our shareholders on or around September 6, 2024.

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Basis of Preparation and Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of preparation	Basis of preparation The unaudited consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). The unaudited consolidated financial statements do not include all of the disclosures required under U.S. GAAP in the annual consolidated financial statements, and should be read in conjunction with our audited annual financial statements for the year ended December 31, 2023, which are included in our annual report on Form 20-F for the fiscal year ended December 31, 2023, filed with the Securities and Exchange Commission on March 27, 2024. The Consolidated Balance Sheet data as of December 31, 2023 was derived from our audited annual financial statements. The amounts are presented in millions of United States dollars ("U.S. dollar" or "$"), unless otherwise stated. The financial statements have been prepared on a going concern basis and in management's opinion, all adjustments necessary for a fair presentation of the financial statements are reflected in the interim periods presented.
Revenue	Revenue The Company performs services that represent a single performance obligation under its drilling contracts. This performance obligation is satisfied over time. The Company earns revenues primarily by performing the following activities: (i) providing the drilling rig, work crews, related equipment and services necessary to operate the rig (ii) delivering the drilling rig by mobilizing to and demobilizing from the drilling location, and (iii) performing certain pre-operating activities, including rig preparation activities or equipment modifications required for the contract. The Company recognizes revenues earned under drilling contracts based on variable dayrates, which range from full operating dayrates to lower rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has operating dayrates that change over the firm term of the contract. Such dayrate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes revenues earned in relation to contract management agreements where we provide rig operational and maintenance support services to third parties based either on a cost-plus or dayrate basis. Such consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes revenues earned in relation to certain bareboat charter agreements where we lease our owned rigs to third parties based on fixed daily rates, which range from operating rates to stand-by rates or zero rates for periods when drilling operations are interrupted or restricted, based on the specific activities performed during the contract. The total transaction price is determined for each individual contract by estimating both fixed and variable consideration expected to be earned over the firm term of the contract and may include the blending of rates when a contract has fixed daily rates that change over the firm term of the contract. Such fixed daily rate consideration is attributed to the distinct time period to which it relates within the contract term, and therefore is recognized as the Company performs the services. The Company recognizes reimbursement revenues and the corresponding costs, gross, at a point in time, as the Company provides the customer-requested goods and services, when such reimbursable costs are incurred while performing drilling operations. Reimbursable revenues are recognized in 'Dayrate revenue' in the Unaudited Condensed Consolidated Statements of Operations. Prior to performing drilling operations, the Company may receive pre-operating revenues, on either a fixed lump-sum or variable dayrate basis, for mobilization, contract preparation, customer-requested goods and services or capital upgrades or other upfront payments, which the Company recognizes over time in line with the satisfaction of the performance obligation. These activities are not considered to be distinct within the context of the contract and therefore, the associated revenue is allocated to the overall performance obligation and recognized ratably over the expected term of the related drilling contract. We record a contract liability for mobilization fees received, which is amortized ratably to dayrate revenue as services are rendered over the initial term of the related drilling contract. We may receive fees (on either a fixed lump-sum or variable dayrate basis) for the demobilization of our rigs. Demobilization revenue expected to be received upon contract completion is estimated as part of the overall transaction price at contract inception and recognized over the term of the contract. In most of our contracts, there is uncertainty as to the likelihood and amount of expected demobilization revenue to be received as the amount may vary dependent upon whether or not the rig has additional contracted work following the contract. Therefore, the estimate for such revenue may be constrained, depending on the facts and circumstances pertaining to the specific contract. We assess the likelihood of receiving such revenue based on past experience and knowledge of the market conditions.
Investments in marketable equity securities	Investment in marketable equity securities Investment in marketable equity securities with readily determinable fair values are measured at fair value each reporting period with the related gains and losses, including unrealized, recognized in “Other financial expenses, net” in the Unaudited Condensed Consolidated Statements of Operations. We classify our investment in marketable equity securities as current assets because the securities are available to be sold to meet liquidity needs if necessary, even if it is not the intention to dispose of the securities in the next twelve months.
Use of estimates	Use of estimates The preparation of financial statements in accordance with U.S. GAAP requires that management make estimates and assumptions affecting the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Adoption of new accounting standards	Adoption of new accounting standards In June 2022, the Financial Accounting Standards Board ("FASB") issued ASU 2022-03 Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. The amendments clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. The amendments also clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction and require the following disclosures for equity securities subject to contractual sale restrictions: 1) The fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; 2) The nature and remaining duration of the restriction(s) and 3) The circumstances that could cause a lapse in the restriction(s). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In March 2023, the FASB issued ASU 2023-01 Leases (Topic 842): Common Control Arrangements. The amendments provide a practical expedient for private companies and not-for-profit entities that are not conduit bond obligors to use the written terms and conditions of a common control arrangement to determine whether a lease exists and, if so, the classification of and accounting for that lease. If no written terms and conditions exist (including in situations in which an entity does not document existing unwritten terms and conditions in writing upon transition to the practical expedient), an entity is prohibited from applying the practical expedient and must evaluate the enforceable terms and conditions to apply Topic 842. Also, the amendments require that leasehold improvements associated with common control leases be: 1) Amortized by the lessee over the useful life of the leasehold improvements to the common control group (regardless of the lease term) as long as the lessee controls the use of the underlying asset (the leased asset) through a lease. However, if the lessor obtained the right to control the use of the underlying asset through a lease with another entity not within the same common control group, the amortization period may not exceed the amortization period of the common control group; 2) Accounted for as a transfer between entities under common control through an adjustment to equity (or net assets for not-for-profit entities) if, and when, the lessee no longer controls the use of the underlying asset. Additionally, those leasehold improvements are subject to the impairment guidance in Topic 360, Property, Plant, and Equipment. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In March 2023, the FASB issued ASU 2023-02 Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method (a consensus of the Emerging Issues Task Force). The amendments permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements or related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. In November 2023, the FASB issued ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this Update improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update: 1) Require that a public entity disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the Chief Operating Decision Maker ("CODM") and included within each reported measure of segment profit or loss; 2) Require that a public entity disclose, on an annual and interim basis, an amount for other segment items by reportable segment and a description of its composition; 3) Require that a public entity provide all annual disclosures about a reportable segment’s profit or loss and assets currently required by Topic 280 in interim periods; 4) Clarify that if the CODM uses more than one measure of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources, a public entity may report one or more of those additional measures of segment profit. However, at least one of the reported segment profit or loss measures (or the single reported measure, if only one is disclosed) should be the measure that is most consistent with the measurement principles used in measuring the corresponding amounts in the public entity’s consolidated financial statements; 5) Require that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources; 6) Require that a public entity that has a single reportable segment provide all the disclosures required by the amendments in this Update and all existing segment disclosures in Topic 280. These amendments are effective for the Company from January 1, 2024. There was no impact resulting from these amendments on our unaudited consolidated financial statements and no material impact on our related disclosures as presented in this interim set of accounts for the six months ended June 30, 2024. Accounting pronouncements that have been issued but not yet adopted Standard Description Date of Adoption Effect on our Consolidated Financial Statements or Other Significant Matters ASU 2023-05 Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement The amendments in this Update address the accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The objectives of the amendments are to: (1) provide decision-useful information to investors and other allocators of capital (collectively, investors) in a joint venture’s financial statements; and (2) reduce diversity in practice. To reduce diversity in practice and provide decision-useful information to a joint venture’s investors, the Board decided to require that a joint venture apply a new basis of accounting upon formation, resulting in a joint venture, upon formation, being required to recognize and initially measure its assets and liabilities at fair value (with exceptions to fair value measurement that are consistent with the business combinations guidance). January 1, 2025 Under evaluation ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures The amendments in this Update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). A public business entity is required to provide an explanation, if not otherwise evident, of the individual reconciling items disclosed, such as the nature, effect, and underlying causes of the reconciling items and the judgment used in categorizing the reconciling items. The other amendments in this Update improve the effectiveness and comparability of disclosures by (1) adding disclosures of pretax income (or loss) and income tax expense (or benefit) to be consistent with U.S. Securities and Exchange Commission (SEC) Regulation S-X 210.4-08(h), Rules of General Application—General Notes to Financial Statements: Income Tax Expense, and (2) removing disclosures that no longer are considered cost beneficial or relevant. January 1, 2025 Under evaluation ASU 2024-01: Compensation—Stock Compensation (Topic 718) The amendments in this Update improve GAAP by adding an illustrative example to demonstrate how an entity should apply the scope guidance in paragraph 718-10-15-3 to determine whether a profits interest award should be accounted for in accordance with Topic 718, Compensation—Stock Compensation. The fact patterns in the illustrative example focus on the scope conditions in paragraph 718-10-15-3. The illustrative example is intended to reduce (1) complexity in determining whether a profits interest award is subject to the guidance in Topic 718 and (2) existing diversity in practice. January 1, 2025 Under evaluation As of August 15, 2024, the FASB have issued further updates not included above. We do not currently expect any of these updates to have a material impact on our consolidated financial statements and related disclosures either on transition or in future periods.

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Recently Issued Accounting Standards (Tables)	6 Months Ended
	Jun. 30, 2024
Accounting Changes and Error Corrections [Abstract]
Accounting pronouncements that have been issued but not yet adopted	Accounting pronouncements that have been issued but not yet adopted Standard Description Date of Adoption Effect on our Consolidated Financial Statements or Other Significant Matters ASU 2023-05 Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement The amendments in this Update address the accounting for contributions made to a joint venture, upon formation, in a joint venture’s separate financial statements. The objectives of the amendments are to: (1) provide decision-useful information to investors and other allocators of capital (collectively, investors) in a joint venture’s financial statements; and (2) reduce diversity in practice. To reduce diversity in practice and provide decision-useful information to a joint venture’s investors, the Board decided to require that a joint venture apply a new basis of accounting upon formation, resulting in a joint venture, upon formation, being required to recognize and initially measure its assets and liabilities at fair value (with exceptions to fair value measurement that are consistent with the business combinations guidance). January 1, 2025 Under evaluation ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures The amendments in this Update require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). A public business entity is required to provide an explanation, if not otherwise evident, of the individual reconciling items disclosed, such as the nature, effect, and underlying causes of the reconciling items and the judgment used in categorizing the reconciling items. The other amendments in this Update improve the effectiveness and comparability of disclosures by (1) adding disclosures of pretax income (or loss) and income tax expense (or benefit) to be consistent with U.S. Securities and Exchange Commission (SEC) Regulation S-X 210.4-08(h), Rules of General Application—General Notes to Financial Statements: Income Tax Expense, and (2) removing disclosures that no longer are considered cost beneficial or relevant. January 1, 2025 Under evaluation ASU 2024-01: Compensation—Stock Compensation (Topic 718) The amendments in this Update improve GAAP by adding an illustrative example to demonstrate how an entity should apply the scope guidance in paragraph 718-10-15-3 to determine whether a profits interest award should be accounted for in accordance with Topic 718, Compensation—Stock Compensation. The fact patterns in the illustrative example focus on the scope conditions in paragraph 718-10-15-3. The illustrative example is intended to reduce (1) complexity in determining whether a profits interest award is subject to the guidance in Topic 718 and (2) existing diversity in practice. January 1, 2025 Under evaluation

v3.24.2.u1

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following presents financial information by segment for the three months ended June 30, 2024: Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 226.9 (3.9) 223.0 Bareboat charter revenue 26.6 — 26.6 Management contract revenue 35.1 (23.4) 11.7 Related party revenue — 10.6 10.6 Gain on disposal — 0.2 0.2 Rig operating and maintenance expenses (151.0) 26.9 (124.1) Depreciation of non-current assets (1) (31.5) (0.4) (31.9) General and administrative expenses (1) — (11.6) (11.6) Loss from equity method investments — (2.5) (2.5) Operating income including equity method investments 106.1 (4.1) 102.0 Total assets 3,434.2 (252.6) 3,181.6 The following presents financial information by segment for the three months ended June 30, 2023: (in $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 236.9 (81.8) 155.1 Related party revenue — 32.4 32.4 Gain on disposal — 0.2 0.2 Rig operating and maintenance expenses (169.7) 80.2 (89.5) Depreciation of non-current assets (1) (27.6) (0.4) (28.0) General and administrative expenses (1) — (10.3) (10.3) Income from equity method investments — 3.9 3.9 Operating income including equity method investments 39.6 24.2 63.8 Total assets 3,276.9 (280.8) 2,996.1 The following presents financial information by segment for the six months ended June 30, 2024: (In $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 460.9 (39.6) 421.3 Bareboat charter revenue 37.9 — 37.9 Management contract revenue 54.5 (42.8) 11.7 Related party revenue — 35.0 35.0 Gain on disposal — 0.4 0.4 Rig operating and maintenance expenses (309.3) 81.2 (228.1) Depreciation of non-current assets (1) (63.0) (0.7) (63.7) General and administrative expenses(1) — (25.0) (25.0) Income from equity method investments — 2.9 2.9 Operating income including equity method investments 181.0 11.4 192.4 The following presents financial information by segment for the six months ended June 30, 2023: (In $ millions) Dayrate Reconciling Items (2) Consolidated total Dayrate revenue 454.7 (157.9) 296.8 Related party revenue — 62.7 62.7 Gain on disposal — 0.3 0.3 Rig operating and maintenance expenses (329.7) 154.7 (175.0) Depreciation of non-current assets (1) (55.4) (0.8) (56.2) General and administrative expenses(1) — (22.7) (22.7) Income from equity method investments — 6.3 6.3 Operating income including equity method investments 69.6 42.6 112.2 (1) General and administrative expenses and depreciation expense incurred by our corporate office are not allocated to our operating segment for purposes of measuring segment operating income / (loss) and are included in "Reconciling items." (2) The full operating results included above for our equity method investments are not included within our consolidated results and thus are deducted under "Reconciling items" and replaced with our income / (loss) from equity method investments (see Note 6 - Equity Method Investments).
Revenues by Geographic Area	The following presents our revenues by geographic area: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Mexico 80.3  43.0  146.5  82.5  South East Asia 74.4  58.5  138.5  110.4  Middle East 67.8  31.6  129.3  62.2  West Africa 41.3  45.9  76.7  89.3  Europe 8.1  8.5  14.9  15.1  Total 271.9  187.5  505.9  359.5
Major Customers by Reporting Segments	The following customers accounted for more than 10% of our dayrate and related party revenues: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In % of operating revenues) Saudi Arabian Oil Company 16  % 13  % 16  % 13  % PTT Exploration and Production Public Company Limited 12  % 9  % 10  % 9  % ENI Congo S.A. 11  % 14  % 11  % 14  % Perfomex 4  % 17  % 7  % 18  % Total 43  % 53  % 44  % 54  % Fixed Assets — Jack-up rigs (1)
Long-lived Assets by Geographic Areas	The following presents the net book value of our jack-up rigs by geographic area: June 30, 2024 December 31, 2023 (In $ millions) Mexico 803.7  815.4  South East Asia 664.7  673.4  Middle East 542.5  553.0  West Africa 437.8  444.8  Europe 89.8  91.7  Total 2,538.5  2,578.3  (1) The fixed assets referred to in the table above exclude assets under construction. Asset locations at the end of a period are not necessarily indicative of the geographical distribution of the revenues or operating profits generated by such assets during the associated periods.

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Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Contract Assets, Contract Liabilities and Contract Costs from Contracts with Customers	The following presents our contract assets and liabilities from our contracts with customers: June 30, 2024 December 31, 2023 (In $ millions) Accrued revenue (1) 103.8  73.7  Current contract assets 103.8  73.7  Non-current accrued revenue (2) 2.6  2.3  Non-current contract asset 2.6  2.3  Total contract asset 106.4  76.0  Current deferred mobilization, demobilization and other revenue (33.4) (59.5) Current contract liability (33.4) (59.5) Non-current deferred mobilization, demobilization and other revenue (27.9) (56.6) Non-current contract liability (27.9) (56.6) Total contract liability (61.3) (116.1) (1) Accrued revenue includes $14.0 million ($7.3 million as of December 31, 2023) related to the current portion of deferred variable rate revenue, $2.7 million ($1.1 million as of December 31, 2023) pertaining to the current portion of deferred demobilization revenue, and $0.6 million ($1.2 million as of December 31, 2023) related to the current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023). (2) Non-current accrued revenue includes $2.5 million ($1.5 million as of December 31, 2023) pertaining to the non-current portion of deferred demobilization revenue, and $0.1 million ($0.8 million as of December 31, 2023) related to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two of our contracts as at December 31, 2023). Non-current accrued revenue is included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets) Contract Costs Deferred mobilization and contract preparation costs relate to costs incurred to prepare a rig for contract and delivery or to mobilize a rig to the drilling location. We defer pre‑operating costs, such as contract preparation and mobilization costs, and recognize such costs on a straight‑line basis, over the estimated firm period of the drilling contract. Costs incurred for the demobilization of rigs at contract completion are recognized as incurred during the demobilization period. June 30, 2024 December 31, 2023 (In $ millions) Current deferred mobilization and contract preparation costs 31.8  39.4  Non-current deferred mobilization and contract preparation costs (1) 31.6  42.6  Total deferred mobilization and contract preparation asset 63.4  82.0  (1) Non-current deferred mobilization and contract preparation costs are included in "Other non-current assets" in our Unaudited Condensed Consolidated Balance Sheets (see Note 15 - Other Non-Current Assets).
Changes in the Remaining Performance Obligation Contract Asset Balances	Total movement in our contract assets and contract liabilities balances during the six months ended June 30, 2024 are as follows: (In $ millions) Contract assets Contract liabilities Balance as of December 31, 2023 76.0  116.1  Performance obligations satisfied during the reporting period 94.2  —  Amortization of revenue —  (68.7) Unbilled demobilization revenue 2.6  —  Unbilled variable rate revenue 6.7  —  Performance obligations to be satisfied over time —  2.6  Unbilled mobilization revenue 0.6  —  Cash received, excluding amounts recognized as revenue —  11.3  Cash received against the contract asset balance (73.7) —  Balance as of June 30, 2024 106.4  61.3
Disaggregation of Revenue	Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Over time 264.4  180.2  492.7  347.1  Point in time 7.5  7.3  13.2  12.4  Total 271.9  187.5  505.9  359.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	Revenue on existing contracts, where performance obligations are unsatisfied or partially unsatisfied at the balance sheet date, is expected to be recognized as follows as at June 30, 2024: For the periods ending June 30, (In $ millions) 2025 2026 2027 2028 onwards Dayrate revenue 913.9  411.4  65.2  58.5  Other revenue (1) 72.7  36.1  6.7  7.0  Total 986.6  447.5  71.9  65.5  (1) Other revenue represents lump sum revenue associated with contract preparation and mobilization and is recognized ratably over the initial firm term of the associated contract in "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations.

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Equity Method Investments (Tables)	6 Months Ended
	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	The below tables set forth the results from these entities, on a 100% basis, for the three months ended June 30, 2024 and 2023: Three months ended June 30, 2024 Three months ended June 30, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Revenue 24.5 2.8 72.4 9.4 Operating expenses (24.0) (2.9) (71.6) (8.6) Net income (2.7) (2.1) 6.0 1.6 The below tables set forth the results from these entities, on a 100% basis, for the six months ended June 30, 2024 and 2023: Six months ended June 30, 2024 Six months ended June 30, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Revenue 77.6 4.8 142.9 15.0 Operating expenses (76.4) (4.8) (140.0) (14.7) Net income / (loss) 7.4 (1.7) 10.1 2.2 Summarized balance sheets, on a 100% basis of the Company's equity method investees are as follows: As at June 30, 2024 As at December 31, 2023 In $ millions Perfomex Perfomex II Perfomex Perfomex II Cash and restricted cash (1) 3.0 — 11.4 0.5 Total current assets 196.5 33.4 271.4 35.1 Total non-current assets 20.7 2.0 12.3 2.1 Total assets 217.2 35.4 283.7 37.2 Total current liabilities 191.6 23.6 257.2 23.8 Total non-current liabilities — 0.4 8.3 0.2 Equity 25.6 11.4 18.2 13.2 Total Liabilities and Equity 217.2 35.4 283.7 37.2 (1) As of June 30, 2024, Perfomex had restricted cash of $2.4 million. The following presents our investments in equity method investments as at June 30, 2024: In $ millions Perfomex Perfomex II Borr Total Balance as of December 31, 2023 9.1  6.6  15.7  Income on a percentage basis 3.8  (0.9) 2.9  Balance as of June 30, 2024 12.9  5.7  18.6

v3.24.2.u1

Interest Expense (Tables)	6 Months Ended
	Jun. 30, 2024
Other Income and Expenses [Abstract]
Schedule of interest expense, net of amounts capitalized	Interest expense is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Debt interest expense (47.7) (38.4) (92.4) (75.2) Amortization of deferred finance charges (2.8) (3.2) (5.5) (5.0) Amortization of debt discount (1.7) —  (3.4) —  Amortization of debt premium 0.2  —  0.3  —  Total (52.0) (41.6) (101.0) (80.2)

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Other Financial Expenses, Net (Tables)	6 Months Ended
	Jun. 30, 2024
Other Income and Expenses [Abstract]
Schedule of Other Nonoperating Income (Expense)	Other financial expenses, net is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Yard cost cover expense (5.6) (5.4) (11.2) (10.9) Bank commitment, guarantee and other fees (0.9) (0.8) (1.9) (1.2) Foreign exchange loss (0.2) (3.2) (2.3) (1.6) Other financial income / (expenses) (1) 0.6  (0.3) (0.9) (0.3) Unrealized changes in value of financial instruments 0.3  —  0.3  —  Total (5.8) (9.7) (16.0) (14.0) (1) Other financial expense for the six months ended June 30, 2024 includes $2.3 million of premium paid related to the Convertible Bonds repurchased in March 2024.

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Taxation (Tables)	6 Months Ended
	Jun. 30, 2024
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	Total pre-tax income / (loss) is comprised of the following by jurisdiction: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Bermuda (7.1) (15.4) (49.2) (30.0) Foreign 53.7  29.6  128.4  52.1  Total 46.6  14.2  79.2  22.1
Income Tax Expense	Income tax (expense) / benefit is comprised of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Current tax (13.6) (12.5) (28.7) (27.9) Change in deferred tax (1.3) (0.9) (4.4) (0.8) Total (14.9) (13.4) (33.1) (28.7)

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Income/(loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings Per Share [Abstract]
Schedule of Computation of Basic EPS	The computation of basic income/(loss) per share (“EPS”) is based on the weighted average number of shares outstanding during the period. Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Basic income (loss) per share 0.13 —  0.18  (0.03) Diluted income (loss) per share 0.12 —  0.18  (0.03) Issued ordinary shares at the end of the period 264,080,391 254,263,598 264,080,391 254,263,598 Net income / (loss) - basic 31.7 0.8 46.1 (6.6) Convertible bond interest using the if converted method 3.0 —  6.0 —  Net income/(loss) - diluted 34.7 0.8 52.1 (6.6) Weighted average numbers of shares outstanding for the period, basic 251,189,331 244,777,228 251,953,928 239,806,937 Dilutive effect of share options, RSU and Convertible Bond(1) 37,247,299  4,142,478  37,395,409  —  Weighted average numbers of shares outstanding for the period, diluted 288,436,630 248,919,706 289,349,337 239,806,937 (1) For the three and six months ended June 30, 2024, 8,118,362 share options and 862,780 restricted stock units using the treasury stock method and 33,554,319 shares issuable upon exercise of our convertible bonds due in May 2028 with a conversion price of $7.1347 per share, have been included as they are dilutive. For the three months ended June 30, 2023, 9,028,584 share options and 88,584 restricted stock units using the treasury stock method, have been included as they are dilutive. The following potential share issuances effects of Convertible Bonds, share options, RSUs and performance units have been excluded from the calculation of diluted EPS for each of the periods presented because the effects were anti-dilutive. Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Convertible bonds —  34,027,031  —  34,027,031  Share options 2,100,000  280,000  2,100,000  9,220,000  Performance stock units 750,000  500,000  750,000  500,000  Restricted share units —  —  —  88,584

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Other Current Assets (Tables)	6 Months Ended
	Jun. 30, 2024
Other Current Assets [Abstract]
Schedule of Other Current Assets	Other current assets are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) VAT receivable 8.0  16.5  Client rechargeables 5.2  5.3  Other tax receivables 5.6  4.7  Investment in marketable securities (1) 1.8  —  Right-of-use lease asset (2) 0.5  0.5  Deferred financing fee 0.5  0.5  Other receivables 3.2  4.5  Total 24.8  32.0  (1) Investment in marketable equity securities relates to shares purchased in another listed entity. Unrealized gains for the three months ended June 30, 2024 and for the six months ended June 30, 2024 were $0.3 million (nil for the three and six months ended June 30, 2023). See Note 8 - Other Financial Expenses, net. In July 2024, we sold the shares and we no longer hold any investment in marketable equity securities. (2) The right-of-use lease asset pertains to our office and yard leases.

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Newbuildings (Tables)	6 Months Ended
	Jun. 30, 2024
New buildings [Abstract]
Carrying Value of New Buildings	The table below sets forth the carrying value of our newbuildings: June 30, 2024 December 31, 2023 (In $ millions) Opening balance 5.4  3.5  Additions 18.0  1.9  Total 23.4  5.4

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Jack-Up Rigs (Tables)	6 Months Ended
	Jun. 30, 2024
Jack Up Rigs [Abstract]
Schedule of Jack-Up Rigs	Set forth below is the carrying value of our jack-up rigs: June 30, 2024 December 31, 2023 (In $ millions) Opening balance 2,578.3  2,589.1  Additions 23.3  104.7  Depreciation and amortization (63.1) (115.5) Total 2,538.5  2,578.3

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Leases (Tables)	6 Months Ended
	Jun. 30, 2024
Leases [Abstract]
Supplemental Balance Sheet Information	Supplemental balance sheet information related to leases is as follows: (In $ millions) June 30, 2024 December 31, 2023 Operating leases right-of-use assets 1.4  1.6  Current operating lease liabilities 0.5  0.5  Non-current operating lease liabilities 0.9  1.1
Components of Lease Cost	Components of lease expenses are comprised of the following: (In $ millions) Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 Rig operating and maintenance expenses 3.3  2.6  6.3  4.9  General and administrative expenses 0.5  0.3  1.0  0.9  Operating lease expense 3.8  2.9  7.3  5.8
Schedule of future minimum revenues to be received under operating leases	The minimum future revenues to be received under the Company's operating leases on its jack-up rigs as of June 30, 2024, are as follows: (In $ millions) 2024 53.9  2025 106.9  Total minimum contractual future revenues 160.8

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Other Non-Current Assets (Tables)	6 Months Ended
	Jun. 30, 2024
Other Assets, Noncurrent Disclosure [Abstract]
Schedule of Other Non-Current Assets	Other long-term assets are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) Deferred mobilization and contract preparation costs (1) 31.6  42.6  Deferred tax asset 14.9  19.3  Deferred demobilization revenue (2) 2.5  1.5  Deferred financing fee 1.5  1.7  Right-of-use lease asset, non-current (3) 0.9  1.1  Liquidated damages (4) 0.1  0.8  Prepayments 0.1  0.3  Total 51.6  67.3  (1) Non-current deferred mobilization and contract preparation costs relate to the non-current portion of contract mobilization and preparation costs for five of our jack-up rigs (see Note 5 - Contracts with Customers). (2) Non-current deferred demobilization revenue relates to demobilization revenue for two of our jack-up rigs, which will be billed upon contract completion. (3) The right-of-use lease asset pertains to our offices and yard leases. (4) Relates to the non-current portion of liquidated damages associated with a known delay in the operational start date of one of our contracts (two contracts as at December 31, 2023), which is amortized over the firm contract terms and recognized as reduction of "Dayrate revenue" in the Unaudited Condensed Consolidated Statements of Operations.

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Accrued Expenses (Tables)	6 Months Ended
	Jun. 30, 2024
Payables and Accruals [Abstract]
Schedule of Accrued Expenses	Accrued expenses are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) Accrued goods and services received, not invoiced 18.2  19.7  Accrued payroll and bonus 10.6  12.3  Other accrued expenses (1) 40.9  45.0  Total 69.7  77.0  (1) Other accrued expenses include holding costs incurred with the shipyards, professional fees, management fees and other accrued expenses related to rig operations.

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Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Other Liabilities, Current [Abstract]
Schedule of Other Current Liabilities	Other current liabilities are comprised of the following: June 30, 2024 December 31, 2023 (In $ millions) VAT payable 21.0  17.5  Other current taxes payable (1) 20.0  19.7  Corporate income taxes payable 6.6  6.7  Accrued payroll and severance 1.2  0.8  Operating lease liability, current 0.5  0.5  Dividends payable (2) —  11.9  Other current liabilities 3.3  6.1  Total 52.6  63.2  (1) Other current taxes payable include withholding tax, payroll tax and other indirect tax related liabilities. (2) On December 22, 2023, the Company declared a cash distribution of $0.05 per share, corresponding to a total of $11.9 million, which was paid to our shareholders on January 22, 2024.

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Debt (Tables)	6 Months Ended
	Jun. 30, 2024
Debt Disclosure [Abstract]
Schedule of Short-Term Debt	Short-term debt is comprised of the following: Principal Amount (In $ millions) June 30, 2024 December 31, 2023 2028 Notes 75.0  75.0  2030 Notes 25.0  25.0  Additional 2028 Notes 14.6  —  Principal Outstanding 114.6  100.0  Deferred Finance Charges (1) (11.1) (10.3) Debt discount (6.8) (6.8) Debt premium 1.1  —  Carrying Value Short-Term Debt (2) 97.8  82.9
Schedule of Long-Term Debt	Long-term debt is comprised of the following: Principal Amount (In $ millions) June 30, 2024 December 31, 2023 2028 Notes 912.5  950.0  2030 Notes 477.5  490.0  Convertible Bonds 239.4  250.0  Additional 2028 Notes 178.0  —  Principal Outstanding 1,807.4  1,690.0  Deferred Finance Charges (1) (37.9) (40.5) Debt discount (27.3) (30.7) Debt premium 3.6  —  Carrying Value Long-Term Debt (2) 1,745.8  1,618.8  (1) As at June 30, 2024, deferred finance charges include the unamortized legal and bank fees associated with the 2028 Notes, Additional 2028 Notes, 2030 Notes, Convertible Bonds, our undrawn $150.0 million revolving credit facility as well as the unamortized debt issuance cost associated with the fair value of the Share Lending Agreement (see Note 22 - Common Shares). (2) Carrying amounts in the table above include, where applicable, deferred financing fees, debt discounts and debt premiums.
Schedule of Maturities of Debt	At June 30, 2024 the scheduled maturities of our debt were as follows: Maturities (In $ millions) 2024 57.2  2025 114.6  2026 114.6  2027 114.6  Thereafter 1,521.0  Total principal debt 1,922.0

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Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments	The Company has the following delivery installment commitments: June 30, 2024 December 31, 2023 (in $ millions) Delivery installments for jack-up drilling rigs 319.8 319.8 Total 319.8 319.8
Maturity of Commitments	The following table sets forth when our delivery installment commitments fall due as of June 30, 2024, based upon best efforts expedited delivery dates: (In $ millions) Less than 1 year 1-2 years 2-3 years Thereafter Total Delivery installments for jack-up rigs 319.8  —  —  —  319.8
Other Commercial Commitments	The Company has the following guarantee commitments: June 30, 2024 December 31, 2023 (in $ millions) Bank guarantees, letters of credit and performance bonds 27.6  29.0  Total 27.6 29.0 As at June 30, 2024, the expected expiration dates of these obligations are as follows: (In $ millions) Less than 1 year 1–3 years Thereafter Total Bank guarantees and performance bonds 8.2  13.8  5.6  27.6
Assets Pledged as Collateral	Assets pledged as collateral June 30, 2024 December 31, 2023 (in $ millions) Book value of jack-up rigs pledged as collateral for debt facilities 2,538.5  2,578.3

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Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2024
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	For the three and six months ended June 30, 2024 and 2023, the bareboat revenues from our related parties consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Bareboat Revenue - Perfomex 10.6  32.4 35.0 62.7 Total 10.6  32.4 35 62.7 The bareboat revenue for the three months ended June 30, 2024 consisted primarily of amortization of deferred revenue associated with the acceleration of amortization of the deferred performance fee associated with the jack-up rigs "Galar", "Odin" and "Njord" as a consequence of the termination of the bareboat charter agreements between Perfomex and the Company, effective April 1, 2024. For the three and six months ended June 30, 2024 and 2023, repayment of loans from our equity method investments consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Perfomex —  (9.8) —  (9.8) Total —  (9.8) —  (9.8) Receivables: The balances with the joint ventures as of June 30, 2024 and December 31, 2023 consisted of the following: June 30, 2024 December 31, 2023 (In $ millions) Perfomex 79.0  92.4 Perfomex II 0.4  2.6 Total 79.4 95.0 Expenses: The transactions with other related parties for six months ended June 30, 2024 and 2023 consisted of the following: Three months ended June 30, 2024 Three months ended June 30, 2023 Six months ended June 30, 2024 Six months ended June 30, 2023 (In $ millions) Magni Partners Limited (1) —  (0.1) —  (0.2) Drew Holdings Limited (2) —  (0.3) —  (1.0) Front End Limited Company (3) (0.8) (0.6) (2.2) (1.1) (1) Magni Partners Limited ("Magni") is a party to a Corporate Services Agreement with the Company, pursuant to which it provides strategic advice and assists in sourcing investment opportunities, financing and other such services as the Company wishes to engage, at the Company's option. There is both a fixed and variable element of the agreement, with the fixed cost element representing Magni's fixed costs and any variable element being at the Company's discretion. Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Magni. Effective January 1, 2024, the fixed element of the agreement was terminated, while the remaining terms of the agreement continue to remain in force. (2) Mr. Tor Olav Trøim, the Chairman of our Board, is the sole owner of Drew Holdings Limited ("Drew"). In January 2023 Drew entered into a Share Lending Framework Agreement ("SLFA") with the Company and DNB Markets for the purposes of facilitating investors’ hedging activities in connection with the Senior Unsecured Convertible bonds due 2028. In order to make the Company's shares available for lending, and only until a certain number of new shares were issued by the Company in connection with such lending arrangement, Drew made up to 15 million shares available to DNB Markets under the SLFA to facilitate such lending to the convertible bond investors requiring such hedging activities. Under the terms of the SLFA, the Company incurred fees payable to Drew for the shares available for lending. As at December 31, 2023, Drew is no longer a party to the SLA (see Note 22 - Common Shares). (3) Front End Limited Company ("Front End") owns 3% of Borr Arabia Well Drilling LLC, an entity that is consolidated by Borr Drilling Limited and incorporated in the Kingdom of Saudi Arabia (the "KSA"). Front End is a party to a Management Agreement with Borr Arabia Well Drilling LLC to provide management services in the KSA, for which it receives a management fee.

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Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2024
Fair Value Disclosures [Abstract]
Carrying Value and Estimated Fair Value of Cash and Financial Instruments	The carrying value and estimated fair value of our financial instruments at June 30, 2024 and December 31, 2023 were as follows: As at June 30, 2024 As at December 31, 2023 (In $ millions) Hierarchy Fair value Carrying value Fair value Carrying value Assets Cash and cash equivalents (1) 1 193.5  193.5  102.5  102.5  Restricted cash (1) 1 1.0  1.0  0.1  0.1  Trade receivables (1) 1 99.1  99.1  56.2  56.2  Other current assets (excluding deferred costs) (1) 1 24.3  24.3  31.5  31.5  Due from related parties (1) 1 79.4  79.4  95.0  95.0  Liabilities Trade payables (1) 1 58.3  58.3  35.5  35.5  Accrued expenses (1) 1 69.7  69.7  77.0  77.0  Short term accrued interest and other items (1) 1 37.2  37.2  42.3  42.3  Other current liabilities (1) 1 52.6  52.6  63.2  63.2  Short-term debt (2) (3) 2 120.3  114.6  104.4  100.0  Long-term debt (2) (4) 2 1,927.6  1,807.4  1,818.0  1,690.0  (1) The carrying values approximate the fair values due to their near term expected receipt of cash. (2) Short term and long term debt excludes debt discounts, debt premiums and deferred finance charges. (3) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030. These are fair valued using observable market-based inputs. (4) This relates to our 10% Notes due 2028 and 10.375% Notes due 2030 and our Convertible Bonds due 2028 These are fair valued using observable market-based inputs.

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Common Shares (Tables)	6 Months Ended
	Jun. 30, 2024
Equity [Abstract]
Share Capital	June 30, 2024 December 31, 2023 (Number of shares of $0.10 each) Authorized shares 315,000,000  315,000,000  June 30, 2024 December 31, 2023 (Number of shares of $0.10 each) Issued 264,080,391  264,080,391  Treasury shares 13,448,389  11,498,355  Outstanding 250,632,002  252,582,036

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General Information (Details) - Jack-up rigs	Jun. 30, 2024 rig
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of rigs owned	22
Number of rigs under construction	2

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Segment Information - Segment Reporting Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 271.9	$ 187.5	$ 505.9	$ 359.5
Gain on disposal	0.2	0.2	0.4	0.3
Rig operating and maintenance expenses	(124.1)	(89.5)	(228.1)	(175.0)
Depreciation of non-current assets	(31.9)	(28.0)	(63.7)	(56.2)
General and administrative expenses	(11.6)	(10.3)	(25.0)	(22.7)
(Loss) / income from equity method investments	(2.5)	3.9	2.9	6.3
Operating income including equity method investments	102.0	63.8	192.4	112.2
Total assets	3,181.6	2,996.1	3,181.6	2,996.1	$ 3,080.1
Related party revenue
Segment Reporting Information [Line Items]
Revenues	10.6	32.4	35.0	62.7
Nonrelated party | Dayrate revenue
Segment Reporting Information [Line Items]
Revenues	223.0	155.1	421.3	296.8
Nonrelated party | Bareboat charter revenue
Segment Reporting Information [Line Items]
Revenues	26.6	0.0	37.9	0.0
Nonrelated party | Management contract revenue
Segment Reporting Information [Line Items]
Revenues	11.7	0.0	11.7	0.0
Operating segments | Dayrate
Segment Reporting Information [Line Items]
Gain on disposal	0.0	0.0	0.0	0.0
Rig operating and maintenance expenses	(151.0)	(169.7)	(309.3)	(329.7)
Depreciation of non-current assets	(31.5)	(27.6)	(63.0)	(55.4)
General and administrative expenses	0.0	0.0	0.0	0.0
(Loss) / income from equity method investments	0.0	0.0	0.0	0.0
Operating income including equity method investments	106.1	39.6	181.0	69.6
Total assets	3,434.2	3,276.9	3,434.2	3,276.9
Operating segments | Dayrate | Related party revenue
Segment Reporting Information [Line Items]
Revenues	0.0	0.0	0.0	0.0
Operating segments | Dayrate | Nonrelated party | Dayrate revenue
Segment Reporting Information [Line Items]
Revenues	226.9	236.9	460.9	454.7
Operating segments | Dayrate | Nonrelated party | Bareboat charter revenue
Segment Reporting Information [Line Items]
Revenues	26.6		37.9
Operating segments | Dayrate | Nonrelated party | Management contract revenue
Segment Reporting Information [Line Items]
Revenues	35.1		54.5
Reconciling items
Segment Reporting Information [Line Items]
Gain on disposal	0.2	0.2	0.4	0.3
Rig operating and maintenance expenses	26.9	80.2	81.2	154.7
Depreciation of non-current assets	(0.4)	(0.4)	(0.7)	(0.8)
General and administrative expenses	(11.6)	(10.3)	(25.0)	(22.7)
(Loss) / income from equity method investments	(2.5)	3.9	2.9	6.3
Operating income including equity method investments	(4.1)	24.2	11.4	42.6
Total assets	(252.6)	(280.8)	(252.6)	(280.8)
Reconciling items | Related party revenue
Segment Reporting Information [Line Items]
Revenues	10.6	32.4	35.0	62.7
Reconciling items | Nonrelated party | Dayrate revenue
Segment Reporting Information [Line Items]
Revenues	(3.9)	$ (81.8)	(39.6)	$ (157.9)
Reconciling items | Nonrelated party | Bareboat charter revenue
Segment Reporting Information [Line Items]
Revenues	0.0		0.0
Reconciling items | Nonrelated party | Management contract revenue
Segment Reporting Information [Line Items]
Revenues	$ (23.4)		$ (42.8)

v3.24.2.u1

Segment Information - Revenue By Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 271.9	$ 187.5	$ 505.9	$ 359.5
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	80.3	43.0	146.5	82.5
South East Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	74.4	58.5	138.5	110.4
Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	67.8	31.6	129.3	62.2
West Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	41.3	45.9	76.7	89.3
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 8.1	$ 8.5	$ 14.9	$ 15.1

v3.24.2.u1

Segment Information - Major Customers By Reporting Segments (Details) - Revenues - Customer concentration risk	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Saudi Arabian Oil Company
Revenue, Major Customer [Line Items]
Percentage of contract revenues	16.00%	13.00%	16.00%	13.00%
PTT Exploration and Production Public Company Limited
Revenue, Major Customer [Line Items]
Percentage of contract revenues	12.00%	9.00%	10.00%	9.00%
ENI Congo S.A.
Revenue, Major Customer [Line Items]
Percentage of contract revenues	11.00%	14.00%	11.00%	14.00%
Perfomex
Revenue, Major Customer [Line Items]
Percentage of contract revenues	4.00%	17.00%	7.00%	18.00%
Total
Revenue, Major Customer [Line Items]
Percentage of contract revenues	43.00%	53.00%	44.00%	54.00%

v3.24.2.u1

Segment Information - Long-lived Assets By Geographic Areas (Details) - Operating segments - Dayrate - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 2,538.5	$ 2,578.3
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	803.7	815.4
South East Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	664.7	673.4
Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	542.5	553.0
West Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	437.8	444.8
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total	$ 89.8	$ 91.7

v3.24.2.u1

Contracts with Customers - Contract Assets and Liabilities (Details) $ in Millions	Jun. 30, 2024 USD ($) contract	Dec. 31, 2023 USD ($) contract
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Accrued revenue	$ 103.8	$ 73.7
Current contract assets	103.8	73.7
Unbilled Receivables, Non-Current	2.6	2.3
Non-current contract asset	2.6	2.3
Total contract asset	106.4	76.0
Contract With Customer Liability Net Current [Abstract]
Current deferred mobilization, demobilization and other revenue	(33.4)	(59.5)
Contract With Customer Liability Net Non-Current [Abstract]
Non-current deferred mobilization, demobilization and other revenue	(27.9)	(56.6)
Total contract liability	$ (61.3)	$ (116.1)
Contracts with delayed start date | contract	1	2
Deferred variable rate revenue
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Accrued revenue	$ 14.0	$ 7.3
Deferred demobilization revenue
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Accrued revenue	2.7	1.1
Unbilled Receivables, Non-Current	2.5	1.5
Liquidated damages costs
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Accrued revenue	0.6	1.2
Unbilled Receivables, Non-Current	$ 0.1	$ 0.8

v3.24.2.u1

Contracts with Customers - Significant Changes in Contract Assets and Contract Liabilities (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Revenue from Contract with Customer [Abstract]
Contract assets, opening balance	$ 76.0
Contract liability, beginning balance	116.1
Performance obligations satisfied during the reporting period	94.2
Amortization of revenue	(68.7)
Unbilled demobilization revenue	2.6
Unbilled variable rate revenue	6.7
Performance obligations to be satisfied over time	2.6
Unbilled mobilization revenue	0.6
Cash received, excluding amounts recognized as revenue	11.3
Cash received against the contract asset balance	(73.7)
Contract assets, closing balance	106.4
Contract liability, closing balance	$ 61.3

v3.24.2.u1

Contracts with Customers - Timing of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total	$ 271.9	$ 187.5	$ 505.9	$ 359.5
Over time
Disaggregation of Revenue [Line Items]
Total	264.4	180.2	492.7	347.1
Point in time
Disaggregation of Revenue [Line Items]
Total	$ 7.5	$ 7.3	$ 13.2	$ 12.4

v3.24.2.u1

Contracts with Customers - Performance obligation expected timing of satisfaction (Details) $ in Millions	Jun. 30, 2024 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 986.6
Performance obligation, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Dayrate revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 913.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Other revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	72.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 447.5
Performance obligation, period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Dayrate revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 411.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Other revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	36.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 71.9
Performance obligation, period	3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Dayrate revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 65.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Other revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	6.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 65.5
Performance obligation, period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Dayrate revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 58.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | Other revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, amount	$ 7.0

v3.24.2.u1

Contracts with Customers - Contract Costs (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Current deferred mobilization and contract preparation costs	$ 31.8	$ 39.4
Non-current deferred mobilization and contract preparation costs	31.6	42.6
Total deferred mobilization and contract preparation asset	$ 63.4	$ 82.0

v3.24.2.u1

Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Decrease in deferred mobilization and contract preparation costs	$ (18.6)
Total deferred mobilization and contract preparation asset	63.4	$ 82.0
Additional deferred contract preparation and mobilization costs	13.2
Capitalized contract cost, amortization	$ 31.8

v3.24.2.u1

Equity Method Investments - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) jointVentureCompany rig	Apr. 01, 2024 USD ($)	Jan. 01, 2024 USD ($)	Dec. 31, 2023 USD ($)
Opex Perforadora S.A. de C.V. (“Opex”) | Perfomex
Equity Method Investment, Summarized Financial Information [Abstract]
Service agreement termination fee payable, total		$ 21.0	$ 14.0
Service agreement termination fee payable, per jack-up rig		$ 7.0	$ 7.0
Perfomex and Perfomex II
Equity Method Investment, Summarized Financial Information [Abstract]
Percentage acquired share by the entity	51.00%
Number of joint ventures for bareboat charters | jointVentureCompany	2
Number of rigs previously on bareboat charter | rig	5
Perfomex and Perfomex II | Proyectos Globales de Energia y Servicos CME, S.A. DE C.V.
Equity Method Investment, Summarized Financial Information [Abstract]
Percentage acquired share by the entity	49.00%
Opex and Akal | Perfomex and Perfomex II
Equity Method Investment, Summarized Financial Information [Abstract]
Contracts receivable	$ 95.7			$ 164.9
Billed contracts receivable	89.8			131.7
Unbilled contracts receivable	$ 5.9			$ 33.2

v3.24.2.u1

Equity Method Investments - Summarized Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Equity Method Investment, Summarized Financial Information [Abstract]
Total	$ 271.9	$ 187.5	$ 505.9	$ 359.5
Operating expenses	(167.6)	(127.8)	(316.8)	(253.9)
Perfomex
Equity Method Investment, Summarized Financial Information [Abstract]
Total	24.5	72.4	77.6	142.9
Operating expenses	(24.0)	(71.6)	(76.4)	(140.0)
Net income	(2.7)	6.0	7.4	10.1
Perfomex II
Equity Method Investment, Summarized Financial Information [Abstract]
Total	2.8	9.4	4.8	15.0
Operating expenses	(2.9)	(8.6)	(4.8)	(14.7)
Net income	$ (2.1)	$ 1.6	$ (1.7)	$ 2.2

v3.24.2.u1

Equity Method Investments - Summarized Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Cash and restricted cash	$ 194.5	$ 283.0	$ 102.6	$ 83.8	$ 258.7	$ 118.5
Total current assets	546.2		409.9
Total non-current assets	2,635.4		2,670.2
Total assets	3,181.6		3,080.1	2,996.1
Total current liabilities	349.0		360.4
Total non-current liabilities	1,833.4		1,735.7
Equity	999.2	$ 989.6	984.0	$ 906.2	$ 904.1	$ 897.8
Total liabilities and equity	3,181.6		3,080.1
Perfomex
Schedule of Equity Method Investments [Line Items]
Cash and restricted cash	3.0		11.4
Total current assets	196.5		271.4
Total non-current assets	20.7		12.3
Total assets	217.2		283.7
Total current liabilities	191.6		257.2
Total non-current liabilities	0.0		8.3
Equity	25.6		18.2
Total liabilities and equity	217.2		283.7
Restricted cash	2.4
Perfomex II
Schedule of Equity Method Investments [Line Items]
Cash and restricted cash	0.0		0.5
Total current assets	33.4		35.1
Total non-current assets	2.0		2.1
Total assets	35.4		37.2
Total current liabilities	23.6		23.8
Total non-current liabilities	0.4		0.2
Equity	11.4		13.2
Total liabilities and equity	$ 35.4		$ 37.2

v3.24.2.u1

Equity Method Investments - Investments In Equity Method Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2023			$ 15.7
Income on a percentage basis	$ (2.5)	$ 3.9	2.9	$ 6.3
Balance as of June 30, 2024	18.6		18.6
Perfomex
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2023			9.1
Income on a percentage basis			3.8
Balance as of June 30, 2024	12.9		12.9
Perfomex II
Schedule of Equity Method Investments [Line Items]
Balance as of December 31, 2023			6.6
Income on a percentage basis			(0.9)
Balance as of June 30, 2024	$ 5.7		$ 5.7

v3.24.2.u1

Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Other Income and Expenses [Abstract]
Debt interest expense	$ (47.7)	$ (38.4)	$ (92.4)	$ (75.2)
Amortization of deferred finance charges	(2.8)	(3.2)	(5.5)	(5.0)
Amortization of debt discount	(1.7)	0.0	(3.4)	0.0
Amortization of debt premium	0.2	0.0	0.3	0.0
Total	$ (52.0)	$ (41.6)	$ (101.0)	$ (80.2)

v3.24.2.u1

Other Financial Expenses, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Other Income and Expenses [Abstract]
Yard cost cover expense	$ (5.6)	$ (5.4)	$ (11.2)	$ (10.9)
Bank commitment, guarantee and other fees	(0.9)	(0.8)	(1.9)	(1.2)
Foreign exchange loss	(0.2)	(3.2)	(2.3)	(1.6)
Other financial expense	0.6	(0.3)	(0.9)	(0.3)
Unrealized gain on marketable securities	0.3	0.0	0.3	0.0
Total	$ (5.8)	(9.7)	(16.0)	$ (14.0)
Premium paid convertible bonds repurchased		$ 2.3	$ 2.3

v3.24.2.u1

Other Financial Expenses, Net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Other Income and Expenses [Abstract]
Amortization of deferred finance charges	$ 2.8	$ 3.2	$ 5.5	$ 5.0

v3.24.2.u1

Taxation - Total Pre-Tax Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Bermuda	$ (7.1)	$ (15.4)	$ (49.2)	$ (30.0)
Foreign	53.7	29.6	128.4	52.1
Income before income taxes	$ 46.6	$ 14.2	$ 79.2	$ 22.1

v3.24.2.u1

Taxation - Components of Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Current tax	$ (13.6)	$ (12.5)	$ (28.7)	$ (27.9)
Change in deferred tax	(1.3)	(0.9)	(4.4)	(0.8)
Total	$ (14.9)	$ (13.4)	$ (33.1)	$ (28.7)

v3.24.2.u1

Income/(loss) Per Share - Schedule of Computation of Basic Loss Per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic loss per share (in dollars per share)	$ 0.13	$ 0	$ 0.18	$ (0.03)
Diluted loss per share (in dollars per share)	$ 0.12	$ 0	$ 0.18	$ (0.03)
Issued ordinary shares at the end of the period (in shares)	264,080,391	254,263,598	264,080,391	254,263,598	264,080,391
Net income / (loss) - basic	$ 31.7	$ 0.8	$ 46.1	$ (6.6)
Convertible bond interest using the if converted method	3.0	0.0	6.0	0.0
Net income/(loss) - diluted	$ 34.7	$ 0.8	$ 52.1	$ (6.6)
Weighted-average shares outstanding, basic (in shares)	251,189,331	244,777,228	251,953,928	239,806,937
Weighted-average shares outstanding, diluted (in shares)	288,436,630	248,919,706	289,349,337	239,806,937
Dilutive shares included in adjustment (in shares)	37,247,299	4,142,478	37,395,409	0
Dilutive effect of conversion of debt securities (in shares)	33,554,319		33,554,319
Convertible bonds
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	0	34,027,031	0	34,027,031
Share options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	2,100,000	280,000	2,100,000	9,220,000
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	750,000	500,000	750,000	500,000
Restricted share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	0	0	0	88,584
Share options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of share options and RSU (in shares)	8,118,362	9,028,584	8,118,362
Restricted share units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive effect of share options and RSU (in shares)	862,780	88,584	862,780

v3.24.2.u1

Income/(loss) Per Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	May 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Feb. 28, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share lending arrangement, shares outstanding (in shares)						12,081,900	14,443,270
Conversion price (in dollars per share)	$ 7.1347	$ 7.3471	$ 7.1347	$ 7.3471
Convertible Bonds
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share lending arrangement, shares outstanding (in shares)	12,081,900		12,081,900
Convertible bonds issuance							$ 250.0	$ 250.0
Conversion price (in dollars per share)					$ 7.13147			$ 7.3471
Convertible bonds
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	0	34,027,031	0	34,027,031
Share options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	2,100,000	280,000	2,100,000	9,220,000
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of anti-dilutive securities (in shares)	750,000	500,000	750,000	500,000

v3.24.2.u1

Other Current Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Other Current Assets [Abstract]
VAT receivable	$ 8.0		$ 8.0		$ 16.5
Client rechargeables	5.2		5.2		5.3
Other tax receivables	5.6		5.6		4.7
Investment in marketable securities	1.8		1.8		0.0
Right of use lease asset	0.5		0.5		0.5
Deferred financing fee	0.5		0.5		0.5
Other receivables	3.2		3.2		4.5
Total	24.8		24.8		$ 32.0
Unrealized gain on marketable securities	$ 0.3	$ 0.0	$ 0.3	$ 0.0

v3.24.2.u1

Newbuildings - Schedule of Newbuidlings (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
New buildings [Abstract]
Opening balance	$ 5.4	$ 3.5
Additions	18.0	1.9
Total	$ 23.4	$ 5.4

v3.24.2.u1

Newbuildings - Narrative (Details) $ in Millions	Jun. 30, 2024 USD ($) rig	Dec. 31, 2023 USD ($)
Property, Plant and Equipment [Line Items]
Delivery installments for jack-up drilling rigs | $	$ 319.8	$ 319.8
Jack-up rigs
Property, Plant and Equipment [Line Items]
Number of jack-up rigs scheduled for delivery | rig	2

v3.24.2.u1

Jack-Up Rigs - Schedule of Jack-Up Rigs (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Jack Up Rigs [Roll Forward]
Opening balance	$ 2,578.3	$ 2,589.1
Additions	23.3	104.7
Depreciation and amortization	(63.1)	(115.5)
Total	$ 2,538.5	$ 2,578.3

v3.24.2.u1

Jack-Up Rigs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Jack Up Rigs [Abstract]
Accumulated depreciation, jack-up rigs	$ 661.2		$ 661.2		$ 598.1
Depreciation related to property, plant and equipment	$ 0.3	$ 0.4	$ 0.6	$ 0.8

v3.24.2.u1

Leases - Supplemental Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets and Liabilities, Lessee [Abstract]
Operating leases right-of-use assets	$ 1.4		$ 1.4		$ 1.6
Operating lease liability, current [extensible list]	Other current liabilities		Other current liabilities		Other current liabilities
Operating lease liability, current	$ 0.5		$ 0.5		$ 0.5
Operating Lease noncurrent, [Extensible List]	Other Liabilities, Noncurrent		Other Liabilities, Noncurrent		Other Liabilities, Noncurrent
Non-current operating lease liabilities	$ 0.9		$ 0.9		$ 1.1
Components of Lease Cost [Abstract]
Operating lease expense	3.8	$ 2.9	7.3	$ 5.8
Rig operating and maintenance expenses
Components of Lease Cost [Abstract]
Operating lease expense	3.3	2.6	6.3	4.9
General and administrative expenses
Components of Lease Cost [Abstract]
Operating lease expense	$ 0.5	$ 0.3	$ 1.0	$ 0.9

v3.24.2.u1

Leases - Narrative (Details) $ in Millions			3 Months Ended		6 Months Ended
	Apr. 01, 2024 rig	Jan. 01, 2024 rig	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) rig
Lessee, Lease, Description [Line Items]
Right of use lease asset, current			$ 0.5		$ 0.5		$ 0.5
Right-of-use lease asset, non-current			0.9		0.9		$ 1.1
Operating lease expense			3.8	$ 2.9	7.3	$ 5.8
Number of jack-up rigs under new agreement | rig	3	2
Revenues			271.9	187.5	505.9	359.5
Depreciation of jack-up rigs leased			746.1		746.1
Accumulated depreciation of jack-up rigs leased			160.1		160.1
Jack-up rigs leased to third parties | rig							0
Bareboat charter revenue | Nonrelated party
Lessee, Lease, Description [Line Items]
Revenues			$ 26.6	$ 0.0	$ 37.9	$ 0.0

v3.24.2.u1

Leases - Schedule of future minimum revenues to be received under operating leases (Details) $ in Millions	Jun. 30, 2024 USD ($)
Leases [Abstract]
2024	$ 53.9
2025	106.9
Total minimum contractual future revenues	$ 160.8

v3.24.2.u1

Other Non-Current Assets (Details) $ in Millions	Jun. 30, 2024 USD ($) contract rig	Dec. 31, 2023 USD ($) contract
Disaggregation of Revenue [Line Items]
Deferred mobilization and contract preparation cost	$ 31.6	$ 42.6
Deferred tax asset	14.9	19.3
Deferred demobilization revenue	2.6	2.3
Deferred financing fee	1.5	1.7
Right-of-use lease asset, non-current	0.9	1.1
Liquidated damages	0.1	0.8
Prepayments	0.1	0.3
Other non-current assets	$ 51.6	$ 67.3
Right-of-use asset, non-current [extensible list]	Other non-current assets	Other non-current assets
Rigs under contract mobilization and preparation | rig	5
Rigs to be billed upon completion | rig	2
Contracts with delayed start date | contract	1	2
Deferred demobilization revenue
Disaggregation of Revenue [Line Items]
Deferred demobilization revenue	$ 2.5	$ 1.5

v3.24.2.u1

Accrued Expenses (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Accrued goods and services received, not invoiced	$ 18.2	$ 19.7
Accrued payroll and bonus	10.6	12.3
Other accrued expenses	40.9	45.0
Total	$ 69.7	$ 77.0

v3.24.2.u1

Other Current Liabilities (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended
	Jun. 17, 2024	Mar. 18, 2024	Jan. 22, 2024	May 31, 2024	Mar. 31, 2024	Jan. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Other Liabilities, Current [Abstract]
VAT payable							$ 21.0	$ 17.5
Other current taxes payable							20.0	19.7
Corporate income taxes payable							6.6	6.7
Accrued payroll and severance							$ 1.2	$ 0.8
Operating lease liability, current [extensible list]							Total	Total
Operating lease liability, current							$ 0.5	$ 0.5
Dividends payable							0.0	11.9
Other current liabilities							3.3	6.1
Total							$ 52.6	$ 63.2
Dividend paid per share (in USD per share)	$ 0.10	$ 0.05	$ 0.05	$ 0.10	$ 0.05	$ 0.05
Dividends paid	$ 23.9	$ 11.9	$ 11.9

v3.24.2.u1

Debt - Schedule of Short-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Principal Outstanding	$ 114.6	$ 100.0
Deferred finance charges	(11.1)	(10.3)
Debt discount	(6.8)	(6.8)
Debt premium	1.1	0.0
Carrying value short-term debt	97.8	82.9
2028 Notes
Debt Instrument [Line Items]
Short-term debt	75.0	75.0
2030 Notes
Debt Instrument [Line Items]
Short-term debt	25.0	25.0
Additional 2028 Notes
Debt Instrument [Line Items]
Short-term debt	$ 14.6	$ 0.0

v3.24.2.u1

Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Carrying value long-term debt	$ 1,745.8	$ 1,618.8
Principal Outstanding	1,807.4	1,690.0
Deferred finance charges	(37.9)	(40.5)
Debt discount	(27.3)	(30.7)
Debt premium	3.6	0.0
2028 Notes
Debt Instrument [Line Items]
Carrying value long-term debt	912.5	950.0
2030 Notes
Debt Instrument [Line Items]
Carrying value long-term debt	477.5	490.0
Convertible Bonds
Debt Instrument [Line Items]
Carrying value long-term debt	239.4	250.0
Additional 2028 Notes
Debt Instrument [Line Items]
Carrying value long-term debt	178.0	$ 0.0
Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 150.0

v3.24.2.u1

Debt - Schedule of Maturities of Debt (Details) $ in Millions	Jun. 30, 2024 USD ($)
Debt Disclosure [Abstract]
2024	$ 57.2
2025	114.6
2026	114.6
2027	114.6
Thereafter	1,521.0
Total principal debt	$ 1,922.0

v3.24.2.u1

Debt - Narrative (Details) $ / shares in Units, $ in Millions						1 Months Ended				3 Months Ended	6 Months Ended
	Jun. 17, 2024 $ / shares	Mar. 31, 2024 USD ($)	Mar. 18, 2024 $ / shares	Jan. 22, 2024 $ / shares	Nov. 07, 2023 USD ($)	May 31, 2024 shares $ / shares	Mar. 31, 2024 USD ($) $ / shares	Jan. 31, 2024 $ / shares	Feb. 28, 2023 USD ($) shares $ / shares	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2023 $ / shares	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Dividend paid per share (in USD per share) | $ / shares	$ 0.10		$ 0.05	$ 0.05		$ 0.10	$ 0.05	$ 0.05
Conversion price (in dollars per share) | $ / shares										$ 7.3471	$ 7.1347	$ 7.3471
Premium paid convertible bonds repurchased										$ 2.3	$ 2.3
1.54 billion USD notes due 2028 and 2030
Debt Instrument [Line Items]
Convertible bonds issuance					$ 1,540.0
2028 Notes
Debt Instrument [Line Items]
Debt instrument issued, principal					$ 1,025.0
Debt instrument price, percentage					0.97750
Debt instrument, interest rate					10.00%						10.00%
2030 Notes
Debt Instrument [Line Items]
Debt instrument issued, principal					$ 515.0
Debt instrument price, percentage					0.97000
Debt instrument, interest rate					10.375%						10.375%
Additional 2028 Notes
Debt Instrument [Line Items]
Convertible bonds issuance		$ 200.0					$ 200.0
Debt instrument price, percentage		1.025
Proceeds from debt		$ 211.9
Convertible Bonds
Debt Instrument [Line Items]
Convertible bonds issuance									$ 250.0				$ 250.0
Debt instrument, interest rate									5.00%
Convertible shares (in shares) | shares						33,554,319			34,027,031
Conversion price (in dollars per share) | $ / shares						$ 7.13147			$ 7.3471
Debt instrument, repurchased face amount		$ 10.6					10.6
Debt instrument, repurchase price, percentage		1.2088
Debt Instrument, Repurchase Amount		$ 12.9					$ 12.9
Interest bearing debt
Debt Instrument [Line Items]
Average interest rate											9.70%	8.90%
Interest bearing debt excl convertible bonds
Debt Instrument [Line Items]
Average interest rate											10.30%	10.30%

v3.24.2.u1

Commitment and Contingencies - Commitments and Maturity of Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Delivery installments for jack-up drilling rigs	$ 319.8	$ 319.8
Less than 1 year	319.8
1-2 years	0.0
2-3 years	0.0
Thereafter	$ 0.0

v3.24.2.u1

Commitments and Contingencies - Other Commercial Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Total	$ 27.6	$ 29.0
Bank guarantees and performance bonds
Other Commitments [Line Items]
Total	$ 27.6	$ 29.0

v3.24.2.u1

Commitments and Contingencies - Other Commercial Commitments Maturity (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Total	$ 27.6	$ 29.0
Bank guarantees and performance bonds
Other Commitments [Line Items]
Less than 1 year	8.2
1–3 years	13.8
Thereafter	5.6
Total	$ 27.6	$ 29.0

v3.24.2.u1

Commitments and Contingencies - Assets Pledged as Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Book value of jack-up rigs pledged as collateral for debt facilities	$ 2,538.5	$ 2,578.3

v3.24.2.u1

Commitments and Contingencies - Narrative (Details) $ in Millions	Sep. 30, 2023 USD ($)
Seatrium New Energy Limited
Other Commitments [Line Items]
Payment of acceleration costs	$ 12.5

v3.24.2.u1

Related Party Transactions - Transactions with Significant Influence Entities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Amounts of related party transaction	$ 10.6	$ 32.4	$ 35.0	$ 62.7
Funding received from shareholder loan	0.0	(9.8)	0.0	(9.8)
Perfomex
Related Party Transaction [Line Items]
Funding received from shareholder loan	0.0	(9.8)	0.0	(9.8)
Related party revenue
Related Party Transaction [Line Items]
Trade receivables, net	79.4		79.4		$ 95.0
Perfomex | Related party revenue
Related Party Transaction [Line Items]
Trade receivables, net	79.0		79.0		92.4
Perfomex | Bareboat revenue
Related Party Transaction [Line Items]
Amounts of related party transaction	10.6	$ 32.4	35.0	$ 62.7
Perfomex II | Related party revenue
Related Party Transaction [Line Items]
Trade receivables, net	$ 0.4		$ 0.4		$ 2.6

v3.24.2.u1

Related Party Transactions - Transactions with Other Related Parties (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jan. 31, 2023
Related Party Transaction [Line Items]
General and administrative expenses	$ (11.6)	$ (10.3)	$ (25.0)	$ (22.7)
Front End Limited Company | Borr Arabia Well Drilling LLC
Related Party Transaction [Line Items]
Ownership percentage	3.00%		3.00%
Drew Holdings Limited | Convertible Bonds
Related Party Transaction [Line Items]
Share lending arrangement, shares issued (in shares)					15,000,000
Related party revenue | Magni Partners Limited
Related Party Transaction [Line Items]
General and administrative expenses	$ 0.0	(0.1)	$ 0.0	(0.2)
Related party revenue | Drew Holdings Limited
Related Party Transaction [Line Items]
General and administrative expenses	0.0	(0.3)	0.0	(1.0)
Related party revenue | Front End Limited Company
Related Party Transaction [Line Items]
General and administrative expenses	$ (0.8)	$ (0.6)	$ (2.2)	$ (1.1)

v3.24.2.u1

Related Party Transactions - Narrative (Details) $ in Millions	6 Months Ended		14 Months Ended
	Jun. 30, 2024 USD ($) rig	Jun. 30, 2023 rig	Dec. 31, 2023 USD ($) rig	Nov. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Deferred finance charges | $	$ 11.1		$ 10.3
Magni Partners Limited | Related party revenue
Related Party Transaction [Line Items]
Deferred finance charges | $				$ 1.0	$ 1.3
Perfomex
Related Party Transaction [Line Items]
Number of rigs	5	3
Number of rigs on bareboat charter			5
Perfomex II
Related Party Transaction [Line Items]
Number of rigs		2

v3.24.2.u1

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Nov. 07, 2023
Assets
Restricted cash	$ 1.0	$ 0.1
2028 Notes
Liabilities
Debt instrument, interest rate	10.00%		10.00%
2030 Notes
Liabilities
Debt instrument, interest rate	10.375%		10.375%
Fair value | Fair value, inputs, level 1
Assets
Cash and cash equivalents	$ 193.5	102.5
Restricted cash	1.0	0.1
Trade receivables	99.1	56.2
Other current assets, excluding deferred costs	24.3	31.5
Due from related parties	79.4	95.0
Liabilities
Trade payables	58.3	35.5
Accrued expenses	69.7	77.0
Short term accrued interest and other items	37.2	42.3
Other current liabilities	52.6	63.2
Fair value | Fair value, inputs, level 2
Liabilities
Short-term debt	120.3	104.4
Long-term debt	1,927.6	1,818.0
Carrying value
Assets
Cash and cash equivalents	193.5	102.5
Restricted cash	1.0	0.1
Trade receivables	99.1	56.2
Other current assets, excluding deferred costs	24.3	31.5
Due from related parties	79.4	95.0
Liabilities
Trade payables	58.3	35.5
Accrued expenses	69.7	77.0
Short term accrued interest and other items	37.2	42.3
Other current liabilities	52.6	63.2
Carrying value | Fair value, inputs, level 2
Liabilities
Short-term debt	114.6	100.0
Long-term debt	$ 1,807.4	$ 1,690.0

v3.24.2.u1

Fair Value of Financial Instruments - Narrative (Details) $ in Millions	Jan. 31, 2023 USD ($)
Convertible Bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Gross deferred finance charge, share lending arrangement	$ 12.4

v3.24.2.u1

Common Shares - Share Capital (Details) - $ / shares	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Equity [Abstract]
Ordinary shares, par value (in dollars per share)	$ 0.10	$ 0.10
Authorized share capital
Authorized shares (in shares)	315,000,000	315,000,000
Issued and outstanding share capital
Common stock, shares issued (in shares)	264,080,391	264,080,391	254,263,598
Treasury shares (in shares)	13,448,389	11,498,355
Outstanding (in shares)	250,632,002	252,582,036

v3.24.2.u1

Common Shares - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions				1 Months Ended			3 Months Ended		6 Months Ended
	Jun. 17, 2024	Mar. 18, 2024	Jan. 22, 2024	May 31, 2024	Mar. 31, 2024	Jan. 31, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Jan. 31, 2023
Class of Stock [Line Items]
Share lending arrangement, shares outstanding (in shares)					12,081,900						14,443,270
Share options exercised in period (in shares)							0		411,336
Dividend paid per share (in USD per share)	$ 0.10	$ 0.05	$ 0.05	$ 0.10	$ 0.05	$ 0.05
Dividends paid	$ 23.9	$ 11.9	$ 11.9
Drew Holdings Limited
Class of Stock [Line Items]
Common stock, shares issued but not available for trading (in shares)												15,000,000
Convertible Bonds
Class of Stock [Line Items]
Share lending arrangement, shares authorized (in shares)							25,000,000		25,000,000
Lending fee, per investor							0.50%		0.50%
Lending fee							1.00%		1.00%
Gross deferred finance charge, share lending arrangement												$ 12.4
Share lending arrangement, shares outstanding (in shares)							12,081,900		12,081,900
Deferred finance charge, share lending arrangement, amortization							$ 0.6	$ 1.0	$ 1.2	$ 1.0
Convertible Bonds | Short-term debt
Class of Stock [Line Items]
Deferred finance costs							2.5		2.5		$ 2.5
Convertible Bonds | Long-term debt
Class of Stock [Line Items]
Deferred finance costs							$ 6.4		$ 6.4		$ 7.6
Convertible Bonds | Drew Holdings Limited
Class of Stock [Line Items]
Share lending arrangement, shares issued (in shares)												15,000,000

v3.24.2.u1

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended
	Nov. 07, 2023	Aug. 31, 2024	Sep. 06, 2024	Jun. 30, 2024	Mar. 31, 2024	Nov. 30, 2023
180 million USD revolving credit facility | Super Senior Credit Facility
Subsequent Event [Line Items]
Revolving credit facility						$ 180.0
180 million super senior credit facility, RCF
Subsequent Event [Line Items]
Revolving credit facility				$ 150.0
180 million super senior credit facility, RCF | Super Senior Credit Facility
Subsequent Event [Line Items]
Revolving credit facility						150.0
180 million USD revolving credit facility, guarantee facility | Super Senior Credit Facility
Subsequent Event [Line Items]
Revolving credit facility						$ 30.0
Additional 2028 Notes
Subsequent Event [Line Items]
Additional senior secured note					$ 200.0
2028 Notes
Subsequent Event [Line Items]
Debt instrument issued, principal	$ 1,025.0
Debt instrument, interest rate	10.00%			10.00%
Subsequent event
Subsequent Event [Line Items]
Dividends payable per share (in USD per share)			$ 0.10
Subsequent event | 180 million USD revolving credit facility | Super Senior Credit Facility
Subsequent Event [Line Items]
Revolving credit facility		$ 195.0
Subsequent event | 180 million USD revolving credit facility, guarantee facility | Super Senior Credit Facility
Subsequent Event [Line Items]
Revolving credit facility		45.0
Subsequent event | Additional 2028 Notes
Subsequent Event [Line Items]
Debt instrument issued, principal		$ 150.0
Debt instrument, interest rate		10.00%

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