Debt Covenant, Minimum Liquidity Covenant Levels, Amount

No definition available.

Name:	borr_DebtCovenantMinimumLiquidityCovenantLevelsAmount
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt Instrument, Minimum Collateral Amount Per Rig, Year One

+ References

No definition available.

+ Details

Name:	borr_DebtInstrumentMinimumCollateralAmountPerRigYearOne
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Minimum Collateral Amount Per Rig, Year Three

+ References

No definition available.

+ Details

Name:	borr_DebtInstrumentMinimumCollateralAmountPerRigYearThree
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Minimum Collateral Amount Per Rig, Year Two

+ References

No definition available.

+ Details

Name:	borr_DebtInstrumentMinimumCollateralAmountPerRigYearTwo
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument, Percentage Of Future Equity Offerings Used To Repay Facility

+ References

No definition available.

+ Details

Name:	borr_DebtInstrumentPercentageOfFutureEquityOfferingsUsedToRepayFacility
Namespace Prefix:	borr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Percentage Of Payment To Be Made

+ References

No definition available.

+ Details

Name:	borr_DebtInstrumentPercentageOfPaymentToBeMade
Namespace Prefix:	borr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Delivery Financing Per Rig

+ References

No definition available.

+ Details

Name:	borr_DeliveryFinancingPerRig
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Interest Paid, Year One

+ References

No definition available.

+ Details

Name:	borr_InterestPaidYearOne
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Interest Paid, Year Two

+ References

No definition available.

+ Details

Name:	borr_InterestPaidYearTwo
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number Of Jack-Up Rigs Under Mortgage

+ References

No definition available.

+ Details

Name:	borr_NumberOfJackUpRigsUnderMortgage
Namespace Prefix:	borr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Premium Jack Up Rigs Agreed To Acquire

+ References

No definition available.

+ Details

Name:	borr_NumberOfPremiumJackUpRigsAgreedToAcquire
Namespace Prefix:	borr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Payment Of Extension Fee

+ References

No definition available.

+ Details

Name:	borr_PaymentOfExtensionFee
Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Term Of Guaranteed Maturity

+ References

No definition available.

+ Details

Name:	borr_TermOfGuaranteedMaturity
Namespace Prefix:	borr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126999549&loc=d3e4297-108586

+ Details

Name:	us-gaap_InterestPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

Name:	us-gaap_InterestPayableCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=borr_JackUpRigEquipmentAndMachineryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=borr_DeliveryFinancingFromPPLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantMinimumLiquidityCovenantLevelsPeriodAxis=borr_MinimumLiquidityCovenantLevelsPeriod1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod5Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantMinimumLiquidityCovenantLevelsPeriodAxis=borr_MinimumLiquidityCovenantLevelsPeriod2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	borr_DebtCovenantPeriodAxis=borr_DebtCovenantPeriod6Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=borr_DeliveryFinancingFromPPLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - PPL Newbuild Financing (Details) $ in Millions			1 Months Ended					2 Months Ended	9 Months Ended	12 Months Ended
Debt - PPL Newbuild Financing (Details) $ in Millions	Nov. 15, 2022 USD ($) rig	Jan. 31, 2021 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)	Oct. 31, 2017 rig	Dec. 31, 2022 USD ($) rig	Dec. 31, 2023	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Delivery financing per rig																$ 87.0
Proceeds from sale of fixed assets												$ 0.7	$ 2.7	$ 37.7
Book value of jackup rigs pledged as collateral for long-term debt facilities				$ 2,396.2				$ 2,396.2				$ 2,396.2	2,730.8
Jack-up rig equipment and machinery
Debt Instrument [Line Items]
Proceeds from sale of fixed assets	$ 120.0
PPL Delivery Financing
Debt Instrument [Line Items]
Extension fee						$ 7.5
Equity offerings used to repay facility				20.00%				20.00%				20.00%
Number of jack-up rigs secured by mortgage \| rig	9							8
Long-term debt				$ 669.6				$ 669.6				$ 669.6	$ 753.3
Interest Paid, Including Capitalized Interest, Operating and Investing Activities				24.0	$ 13.9							37.9
PPL Delivery Financing \| Forecast
Debt Instrument [Line Items]
Payment % to be made									50.00%	50.00%
Principal payment										$ 64.0	$ 60.0
PPL Delivery Financing \| Subsequent event
Debt Instrument [Line Items]
Interest Paid, Including Capitalized Interest, Operating and Investing Activities			$ 20.0
Period 1 \| PPL Delivery Financing
Debt Instrument [Line Items]
Interest payable															$ 1.0
Interim payment 2021		$ 6.0
Value of rigs, 2021		70.0
Period 2 \| PPL Delivery Financing
Debt Instrument [Line Items]
Interim payment 2022		12.0
Value of rigs, 2022		75.0
Period 3 \| PPL Delivery Financing
Debt Instrument [Line Items]
Minimum liquidity covenant levels, amount		5.0
Period 4 \| PPL Delivery Financing \| Period 1
Debt Instrument [Line Items]
Minimum liquidity covenant levels, amount		10.0
Period 5 \| PPL Delivery Financing \| Period 2
Debt Instrument [Line Items]
Minimum liquidity covenant levels, amount		15.0
Period 6 \| PPL Delivery Financing
Debt Instrument [Line Items]
Value of rigs, thereafter		$ 80.0
PPL Delivery Financing
Debt Instrument [Line Items]
Number of premium jack up rigs agreed to acquire \| rig							9
Term of guaranteed maturity							60 months
Book value of jackup rigs pledged as collateral for long-term debt facilities				$ 1,084.0				$ 1,084.0				$ 1,084.0