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Equity Method Investment In ARO Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 jackup	Mar. 31, 2025 drillship	Mar. 31, 2025	Dec. 31, 2024 USD ($)	Jan. 31, 2020 drillship
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs					52
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
Loss on impairment	$ 7.8	$ 0.0
Shareholder Notes Payable, Term	10 years
Debt Instrument, Basis Spread on Variable Rate	2.10%
Accounts payable - trade	$ 329.3					$ 328.5
Accretion of Discount on the Notes Receivable	6.1	7.0
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	13.5	19.0
Accounts payable - trade	48.4					43.1
Principal amount	376.6					$ 376.6
Accretion of Discount on the Notes Receivable	$ 6.1	$ 7.0
ARO
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage					50.00%

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