Acquisitions and Divestitures - Allocation of Purchase Price: Maersk Drilling (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
	Oct. 03, 2022	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Acquisition related costs			$ 109,424	$ 60,335	$ 84,668
Gain on bargain purchase			0	5,005	0
Liabilities assumed:
Gain on bargain purchase			0	5,005	0
Maersk Drilling Merger
Business Acquisition [Line Items]
Acquisition related costs			24,900	$ 34,100	$ 33,100
Gain on bargain purchase	$ 5,005		5,000
Fair value of Ordinary Shares transferred to legacy Maersk shareholders	1,793,351
Cash paid to legacy Maersk shareholders	887
Fair value of replacement Maersk Drilling RSU Awards attributable to the purchase price	6,780
Deal Completion Bonus	6,177
Fair Value of Compulsory Purchase	193,678
Total purchase price consideration	2,000,873
Assets acquired:
Cash and cash equivalents	172,205
Accounts receivable, net	250,251
Taxes receivable	18,987
Prepaid expenses and other current assets	43,168
Total current assets	484,611
Intangible assets	22,991
Property, plant, and equipment, net	2,756,096
Other assets	94,882
Total assets acquired	3,358,580
Liabilities assumed:
Current maturities of long-term debt	129,130
Accounts payable	130,273
Accrued payroll and related costs	23,884
Taxes payable	29,219
Interest payable	800
Other current liabilities	44,253
Total current liabilities	357,559
Long-term debt	596,692
Deferred income taxes	4,071
Noncurrent contract liabilities	237,703
Other liabilities	156,677
Total liabilities assumed	1,352,702
Net assets acquired	2,005,878
Gain on bargain purchase	5,005		$ 5,000
Purchase price consideration	$ 2,000,873
Net decrease in current taxes receivable		$ 1,600
Net decrease in current taxes payable		9,000
Net increase to deferred tax assets		25,200
Net increase in other current liabilities		3,000
Net increase to reserves for uncertain tax positions		13,100
Net decrease to other tax liabilities		$ 14,600