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Contingencies (Narrative) (Details) R$ in Millions, $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) Rate | Jul. 31, 2023 BRL (R$) | Dec. 31, 2019 USD ($) | Mar. 31, 2024 USD ($) drillship jackup | Dec. 31, 2023 USD ($) | Jan. 31, 2020 drillship
Loss Contingencies [Line Items] |  |  |  |  |  |
Loss Contingency, Damages Sought, Value |  | R$ 601.0 |  | $ 120.0 |  |
Number of Newbuild Jackup Rigs | jackup |  |  |  | 20 |  |
Order Period |  |  |  | 10 years |  |
Percentage of Down Payment Paid for ARO Newbuilds |  |  |  |  |  | 25.00%
ARO Rigs Under Construction | drillship |  |  |  | 2 |  | 2
Maximum Contingent Contributions To Joint Venture |  |  |  | $ 1,250.0 |  |
Letters of credit outstanding, amount |  |  |  | 97.2 |  |
Deposit Liabilities, Collateral Issued, Financial Instruments |  |  |  | 13.2 | $ 12.6 |
Litigation Settlement, Amount Awarded from Other Party |  |  | $ 200.0 |  |  |
Max. amount by which VAL commitment to ARO will be reduced with each rig delivery |  |  |  | $ 250.0 |  |
Line of Credit | Newbuild Funding Obligation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Debt Instrument, Face Amount | $ 359.0 |  |  |  |  |
Long Term Pecentage of Periodic PaymentTerms Balloon Payment To Be Paid | 50.00% |  |  |  |  |
Debt Instrument, Term | 8 years |  |  |  |  |
Minimum | Senior Notes | Newbuild Funding Obligation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate | Rate | 1.25% |  |  |  |  |
Maximum | Senior Notes | Newbuild Funding Obligation |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate | Rate | 1.40% |  |  |  |  |

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