Organization and Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Sep. 24, 2020 subsidiary	Dec. 31, 2023 USD ($) floater jackup segment rig $ / shares	Dec. 31, 2022 USD ($) $ / shares	Oct. 03, 2022 $ / shares	Dec. 31, 2021 USD ($)	Feb. 05, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of drilling rigs | rig		32
Number of floaters | floater		19
Number of jackups | jackup		13
Number of reportable segments | segment		1
Number of additional subsidiaries filed bankruptcy | subsidiary	6
Common stock, par value (usd per share) | $ / shares		$ 0.00001	$ 0.00001	$ 0.00001		$ 0.01
Restricted cash		$ 7,000	$ 9,500
Allowance for credit losses		$ 0	0
Period for incurring maintenance costs, minimum		3 years
Period for incurring maintenance costs, maximum		5 years
Deferred revenues		$ 43,072	59,797		$ 27,755	$ 8,287	$ 59,886
Deferred expenses under drilling contracts		4,400	11,500
Loss reserves for personal injury and protection claims		63,900	35,300
Other Current Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loss reserves for personal injury and protection claims		21,900	15,500
Other Noncurrent Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loss reserves for personal injury and protection claims		$ 42,000	$ 19,800
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard drilling contracts, term		2 months
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Standard drilling contracts, term		60 months
Drilling Equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment		3 years
Drilling Equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment		30 years
Other | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment		2 years
Other | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Maximum useful life of property plant and equipment		40 years
Maersk Drilling
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Common stock, par value (usd per share) | $ / shares				$ 10
Maersk Drilling Merger
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Business combination, percentage of issued and outstanding shares acquired (more than)				90.00%