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Revenue from Contracts with Customers Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Capitalized Contract Cost, Net |  |  |  |  |  | $ 73.5 |
Early Termination Fee Received |  |  |  |  |  | 51.0 |
Asset Impairment Charges | $ 34.5 | $ 34.5 | $ 5.6 | $ 756.5 | $ 0.0 | $ 34.5 | $ 3,646.2
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 |  |  |  |  | 31.4 | $ 57.3 |
Capitalized Contract Cost, Amortization |  |  |  | 7.6 | 22.0 | 61.7 | 42.1
Deferred Certification Costs [Member] |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Capitalized Contract Cost, Net |  |  |  |  | 3.3 | 16.2 |
Capitalized Contract Cost, Amortization |  |  |  | $ 3.1 | $ 0.7 | $ 4.7 | $ 8.9

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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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