Revenue and Customers - Favorable and Unfavorable contracts (Details) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Unfavorable contacts
Beginning balance		$ (181,883)
Ending balance		(50,863)	$ (181,883)
Maersk Drilling
Unfavorable contacts
Beginning balance	$ 0	(181,883)	0
Additions	0	0	(237,703)
Amortization	0	131,020	55,820
Ending balance	0	(50,863)	(181,883)
Maersk Drilling | Favorable contracts
Favorable contracts
Beginning balance	0	34,372	61,849
Additions	113,389	0	22,991
Amortization	(51,540)	(24,244)	(50,468)
Ending balance	$ 61,849	$ 10,128	$ 34,372