Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Equity Method Investment In ARO Narrative (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024 USD ($) jackup drillship	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) jackup drillship	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jan. 31, 2020 drillship
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs	53			53
Number of Newbuild Jackup Rigs \| jackup	20			20
Order Period				10 years
Number of ARO newbuild rigs ordered \| drillship							2
ARO Rigs Under Construction \| drillship	1			1
Asset Impairment Charges	$ 0.0			$ 0.0
Shareholder Notes Payable, Term				10 years
Debt Instrument, Basis Spread on Variable Rate				2.10%
Accounts payable - trade	303.7			$ 303.7		$ 400.1
Accretion of Discount on the Notes Receivable				33.8	$ 21.2
ARO
Schedule of Equity Method Investments [Line Items]
Asset Impairment Charges	$ 28.4		$ 0.0	$ 28.4	0.0
Other
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs	9			9
ARO
Schedule of Equity Method Investments [Line Items]
Total Number Of Contract Drilling Rigs	9			9
ARO
Schedule of Equity Method Investments [Line Items]
Lease Revenue From Related Party	$ 11.3		19.1	$ 42.9	54.7
Accounts payable - trade	14.7			14.7		57.7
Principal amount	352.0	$ 352.0		352.0		$ 402.7
Accretion of Discount on the Notes Receivable	$ 6.2		$ 7.2	33.8	$ 21.2
ARO \| Net Settlement Agreement
Schedule of Equity Method Investments [Line Items]
Reduction of Accounts Payable		50.7
Accounts payable - trade		50.7
Accretion of Discount on the Notes Receivable		$ 13.9		$ 13.9
ARO
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%			50.00%