Onerous Contracts (Details) - USD ($) $ in Millions |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Components of Onerous Contracts [Abstract] | ||
| Onerous rig construction contracts acquired | $ 54.5 | $ 71.3 |
| Onerous rig contract "Tivar" | ||
| Components of Onerous Contracts [Abstract] | ||
| Onerous rig construction contracts acquired | 0.0 | 16.8 |
| Onerous rig contract "Vale" | ||
| Components of Onerous Contracts [Abstract] | ||
| Onerous rig construction contracts acquired | 26.9 | 26.9 |
| Onerous rig contract "Var" | ||
| Components of Onerous Contracts [Abstract] | ||
| Onerous rig construction contracts acquired | $ 27.6 | $ 27.6 |