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Equity Method Investment In ARO Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025	Jun. 30, 2025 jackup	Jun. 30, 2025 drillship	Dec. 31, 2024 USD ($)	Jan. 31, 2020 drillship
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs					49
Number of Newbuild Jackup Rigs | jackup						20
Order Period			10 years
Number of ARO newbuild rigs ordered | drillship									2
ARO Rigs Under Construction | drillship							1
Shareholder Notes Payable, Term			10 years
Debt Instrument, Basis Spread on Variable Rate			2.10%
Accounts payable - trade	$ 332.3		$ 332.3					$ 328.5
Accretion of Discount on the Notes Receivable			12.3	$ 27.6
ARO Rig Currently Under Construction						3	1
Other
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs					7
ARO
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs					9
ARO
Schedule of Equity Method Investments [Line Items]
Lease Revenue From Related Party	16.9	$ 12.6	30.4	$ 31.6
Accounts payable - trade	51.3		51.3					43.1
Principal amount	$ 376.6		$ 376.6					$ 376.6
ARO
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					50.00%

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