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Long-Term Debt (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020 | May 31, 2018
--- | --- | --- | ---
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | $ 1,915,900,000 | $ 1,906,200,000 |
Principal outstanding | 1,862,500,000 | 1,857,500,000 |
Back end fees due to PPL and Keppel on Delivery of rigs | 42,800,000 | 42,800,000 |
Effective interest rate adjustments on PPL and Keppel delivery Financing | 17,100,000 | 13,400,000 |
Deferred finance charges | (6,500,000) | (7,500,000) |
Hayfin Loan Facility |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | 197,000,000.0 | 195,000,000.0 |
Principal | 195,000,000 |  |
Back end fees due to PPL and Keppel on Delivery of rigs | 2,000,000 |  |
Syndicated Senior Secured Credit Facilities |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | 272,700,000 | 270,000,000.0 |
Back end fees due to PPL and Keppel on Delivery of rigs | 2,700,000 |  |
New Bridge Facility |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | 30,300,000 | 30,000,000.0 |
Back end fees due to PPL and Keppel on Delivery of rigs | 300,000 |  |
Convertible Bonds |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | 350,000,000.0 | 350,000,000.0 |
Principal | 350,000,000 |  | $ 350,000,000
Delivery Financing from PPL |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | 753,300,000 | 753,300,000 |
Keppel Rigs |  |  |
Long-term Debt, Current Maturities [Abstract] |  |  |
Long-term debt | $ 259,200,000 | $ 259,200,000 |

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