Revenue and Customers - Favorable and Unfavorable contracts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unfavorable contacts
Beginning balance	$ (50,863)
Ending balance	(8,580)	$ (50,863)
Maersk Drilling
Unfavorable contacts
Beginning balance	(50,863)	(181,883)	$ 0
Additions	(27,663)	0	(237,703)
Amortization	69,946	131,020	55,820
Ending balance	(8,580)	(50,863)	(181,883)
Maersk Drilling | Favorable contracts
Favorable contracts
Beginning balance	10,128	34,372	61,849
Additions	0	0	22,991
Amortization	(9,914)	(24,244)	(50,468)
Ending balance	$ 214	$ 10,128	$ 34,372