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v3.25.3

Property, Plant, and Equipment Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 30, 2025 USD ($) | Sep. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) drillship | Dec. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) | Mar. 31, 2025 USD ($) drillship | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2027 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from disposition of assets |  |  |  |  |  |  | $ 136.3 | $ 0.2 |
Loss on impairment |  | $ 0.0 |  |  | $ 0.0 |  | 7.8 | 0.0 |
Semisubmersible Rigs, Retired | drillship |  |  | 3 |  |  | 3 |  |  |
Proceeds from disposition of assets |  |  |  |  |  |  | 136.3 | 0.2 |
Loss on impairment |  | 0.0 |  |  | 0.0 |  | 7.8 | 0.0 |
Angola office |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Other Assets |  |  | $ 4.0 |  |  |  |  |  |
Proceeds from disposition of assets |  |  | 2.7 | $ 2.5 |  | $ 5.2 |  |  |
Proceeds from disposition of assets |  |  | 2.7 | $ 2.5 |  | $ 5.2 |  |  |
Operating Segments | Jackups |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  | 0.0 |  | 0.0 | 0.0 |
Loss on impairment |  |  |  |  | 0.0 |  | 0.0 | 0.0 |
Operating Segments | Floaters |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Loss on impairment |  |  |  |  | 0.0 |  | 7.8 | 0.0 |
Loss on impairment |  |  |  |  | $ 0.0 |  | $ 7.8 | $ 0.0 |
V75 | Operating Segments | Jackups Member |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Other Assets |  |  | 23.0 |  |  |  |  |  |
Proceeds from disposition of assets |  |  | 14.0 |  |  |  |  |  |
Proceeds from disposition of assets |  |  | 14.0 |  |  |  |  |  |
V75 | Operating Segments | Jackups Member | Subsequent Event |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from disposition of assets |  |  |  |  |  |  |  |  | $ 10.0
Proceeds from disposition of assets |  |  |  |  |  |  |  |  | $ 10.0
DPS-3, DPS-5 & DPS-6 | Operating Segments | Floaters |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from disposition of assets | $ 10.0 |  |  |  |  |  |  |  |
Loss on impairment |  |  | 7.8 |  |  |  |  |  |
Proceeds from disposition of assets | $ 10.0 |  |  |  |  |  |  |  |
Loss on impairment |  |  | $ 7.8 |  |  |  |  |  |
V247 | Operating Segments | Jackups Member |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Other Assets |  | 88.4 |  |  |  |  |  |  |
Proceeds from disposition of assets |  | 108.0 |  |  |  |  |  |  |
Proceeds from disposition of assets |  | $ 108.0 |  |  |  |  |  |  |

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