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Revenue from Contracts with Customers Narrative (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Capitalized Contract Cost, Net |  |  | $ 99.6 |
Early Termination Fee Received |  |  | $ 51.0 |
Minimum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Drilling Contracts, Term |  |  | 1 month |
Maximum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Drilling Contracts, Term |  |  | 5 years |
Upfront Rig Mobilizations And Certain Contract Preparation [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Capitalized Contract Cost, Net |  |  | $ 85.1 | $ 57.3
Capitalized Contract Cost, Amortization | $ 7.6 | $ 22.0 | 92.9 | 61.7
Deferred Certification Costs [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Capitalized Contract Cost, Net |  |  | 14.5 | 16.2
Capitalized Contract Cost, Amortization | $ 3.1 | $ 0.7 | $ 12.7 | $ 4.7

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