Revenue from Contracts with Customers (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Capitalized Contract Cost [Line Items] | |||||
| Capitalized Contract Cost, Net | $ 82.9 | $ 82.9 | |||
| Upfront Rig Mobilizations And Certain Contract Preparation [Member] | |||||
| Capitalized Contract Cost [Line Items] | |||||
| Capitalized Contract Cost, Net | 75.8 | 75.8 | $ 36.6 | ||
| Capitalized Contract Cost, Amortization | 18.1 | $ 9.1 | 50.6 | $ 30.7 | |
| Deferred Certification Costs | |||||
| Capitalized Contract Cost [Line Items] | |||||
| Capitalized Contract Cost, Net | 7.1 | 7.1 | $ 7.6 | ||
| Capitalized Contract Cost, Amortization | $ 1.4 | $ 1.9 | $ 5.1 | $ 6.3 | |
| Minimum | |||||
| Capitalized Contract Cost [Line Items] | |||||
| Remaining duration of drilling contracts | 1 month | 1 month | |||
| Maximum | |||||
| Capitalized Contract Cost [Line Items] | |||||
| Remaining duration of drilling contracts | 4 years | 4 years | |||