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Commitments And Contingencies (Narrative) (Details) R$ in Millions, $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) | Jul. 31, 2023 USD ($) | Jul. 31, 2023 BRL (R$) | Dec. 31, 2019 USD ($) | Dec. 31, 2020 | Dec. 31, 2023 USD ($) jackup | Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Order Period |  |  |  |  | 10 years |  |
PercentageOfDownPaymentPaidForARONewbuilds |  |  |  |  |  | 2500.00% |
ARO Rigs Under Construction | jackup |  |  |  |  |  | 2 |
Maximum contingent contributions to joint venture |  |  |  |  |  | $ 1,250.0 |
Letters of Credit Outstanding, Amount |  |  |  |  |  | 128.8 |
Deposit Liabilities, Collateral Issued, Financial Instruments |  |  |  |  |  | 12.6 | $ 24.4
Cost of ARO newbuild jackups, each |  |  |  |  |  | $ 250.0 |
Loss Contingency, Damages Sought, Value |  | $ 124.0 | R$ 601.0 |  |  |  |
Litigation Settlement, Amount Awarded from Other Party |  |  |  | $ 200.0 |  |  |
Senior Notes [Member] | Newbuild Funding Obligation |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 359.0 |  |  |  |  |  |
Senior Notes [Member] | Newbuild Funding Obligation | ARO |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Long Term Pecentage of Periodic Payment Terms Balloon Payment To Be Paid | 50.00% |  |  |  |  |  |
Debt Instrument, Term | 8 years |  |  |  |  |  |
Senior Notes [Member] | Newbuild Funding Obligation | Secured Overnight Financing Rate (SOFR) | Minimum |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.25% |  |  |  |  |  |
Senior Notes [Member] | Newbuild Funding Obligation | Secured Overnight Financing Rate (SOFR) | Maximum |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.40% |  |  |  |  |  |

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