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Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Capitalized Contract Cost [Line Items] |  |  |
Capitalized Contract Cost, Net | $ 97.4 |  |
Upfront Rig Mobilizations And Certain Contract Preparation [Member] |  |  |
Capitalized Contract Cost [Line Items] |  |  |
Capitalized Contract Cost, Net | 85.3 |  | $ 85.1
Capitalized Contract Cost, Amortization | 23.4 | $ 20.0 |
Deferred Certification Costs |  |  |
Capitalized Contract Cost [Line Items] |  |  |
Capitalized Contract Cost, Net | 12.1 |  | $ 14.5
Capitalized Contract Cost, Amortization | $ 3.1 | $ 2.7 |
Minimum |  |  |
Capitalized Contract Cost [Line Items] |  |  |
Remaining duration of drilling contracts | 1 month |  |
Maximum |  |  |
Capitalized Contract Cost [Line Items] |  |  |
Remaining duration of drilling contracts | 5 years |  |

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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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 -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-3 + Details
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