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Long-Term Debt - Delivery Financing Arrangements (Details) $ in Millions |  |  | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 27, 2021 USD ($) | Jan. 31, 2021 USD ($) | Oct. 31, 2017 rig | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2017 USD ($)
Credit Facility [Abstract] |  |  |  |  |  |  |
Delivery financing per rig |  |  |  |  |  |  | $ 87.0
Long-term debt |  |  |  | $ 1,915.9 | $ 1,906.2 |  |
Delivery Financing from PPL |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Additional payments due at the completion of the amendment agreements for the deferrals | $ 12.7 |  |  |  |  |  |
Additional payments due later in 2022 | 30.0 |  |  |  |  |  |
Payments of debt amendment fee | $ 3.8 |  |  |  |  |  |
Portion of future net equity offerings to repay amounts owed, percentage | 20.00% |  |  |  |  |  |
Long-term debt |  |  |  | 753.3 | $ 753.3 |  |
Delivery Financing from PPL | Period 1 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Interest payable |  |  |  |  |  | $ 1.0 |
Interim payment 2021 |  | $ 6.0 |  |  |  |  |
Value of rigs, 2021 |  | 70.0 |  |  |  |  |
Delivery Financing from PPL | Period 2 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Interim payment 2022 |  | 12.0 |  |  |  |  |
Value of rigs, 2022 |  | 75.0 |  |  |  |  |
Delivery Financing from PPL | Period 3 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Minimum liquidity covenant levels, amount |  | 5.0 |  |  |  |  |
Delivery Financing from PPL | Period 4 | Minimum Liquidity Covenant Levels, Period 1 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Minimum liquidity covenant levels, amount |  | 10.0 |  |  |  |  |
Delivery Financing from PPL | Period 5 | Minimum Liquidity Covenant Levels, Period 2 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Minimum liquidity covenant levels, amount |  | 15.0 |  |  |  |  |
Delivery Financing from PPL | Period 6 |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
Value of rigs, thereafter |  | $ 80.0 |  |  |  |  |
Delivery Financing from PPL |  |  |  |  |  |  |
Credit Facility [Abstract] |  |  |  |  |  |  |
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 |  |  |  | $ 1,253.0 |  |  |

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