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Commitments and contingencies (Details) kr in Millions, R$ in Millions, $ in Millions |  |  | 1 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 06, 2025 USD ($) rig drillship | Mar. 05, 2023 USD ($) | Oct. 31, 2025 USD ($) | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2025 USD ($) rig contract | Sep. 30, 2025 BRL (R$) | Aug. 31, 2025 NOK (kr) | Jul. 11, 2025 USD ($) | Dec. 31, 2024 USD ($) | Nov. 30, 2015 USD ($) rig
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contract value deduction percentage |  |  |  |  |  |  |  |  |  |  | 2.00%
Contract value deduction, value |  |  |  |  |  |  |  |  |  |  | $ 69
Number of active contracts | contract |  |  |  |  |  | 2 |  |  |  |  |
Number of historic contracts | contract |  |  |  |  |  | 2 |  |  |  |  |
Sonadrill | Performance guarantee |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  |  |  |  | $ 1,100 |  |  |  | $ 1,100 |
Number of rigs | rig |  |  |  |  |  | 3 |  |  |  |  |
Sete Brazil Claim |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss contingency, damages sought, value | $ 213 |  |  |  |  | $ 825 |  |  |  |  |
Number of rigs | rig | 28 |  |  |  |  |  |  |  |  |  |
Number of drillships | drillship | 3 |  |  |  |  |  |  |  |  |  |
Loss contingency, delay penalty, percentage | 10.00% |  |  |  |  |  |  |  |  |  |
Surety Bond |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss contingency, damages sought, value |  |  |  |  |  | 82 | R$ 436 |  |  |  |
Tax Year 2009 | Seadrill Servicos De Petroleo Ltda Seadrill Brazil |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss contingency, damages sought, value |  |  |  | $ 79 |  |  |  |  |  |  |
Tax Year 2008, 2012, 2016, And 2017 | Seadrill Servicos De Petroleo Ltda Seadrill Brazil |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss contingency, damages sought, value |  |  |  |  |  | 84 |  |  |  |  |
NIGERIA |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of rigs | rig |  |  |  |  |  |  |  |  |  |  | 3
Brazil | Seadrill Servicos De Petroleo Ltda Seadrill Brazil | Sete Brazil Claim |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of drillships | drillship | 5 |  |  |  |  |  |  |  |  |  |
SFL Hercules Ltd |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount awarded |  | $ 37 |  |  |  |  |  |  |  |  |
Fee expense |  | $ 11 |  |  |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  |  |  |  | 57 |  | kr 574 |  |  |
SFL Hercules Ltd | Bilateral Facility |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Guarantor obligations, maximum exposure, undiscounted |  |  |  |  |  | $ 17 |  | kr 171 |  |  |
Sonadrill fees claimant |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss contingency, damages sought, value |  |  |  |  | $ 72 |  |  |  |  |  |
Sonadrill fees claimant | Subsequent event |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Damages paid |  |  | $ 43 |  |  |  |  |  |  |  |
Sonadrill fees claimant | Maximum |  |  |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated liability |  |  |  |  |  |  |  |  | $ 61 |  |

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