Acquisitions and Divestitures - Allocation of Purchase Price: Diamond Offshore Drilling (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Sep. 04, 2024	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Acquisition related costs			$ 109,424	$ 60,335	$ 84,668
Liabilities assumed:
Proceeds from sale of property, plant, and equipment					$ 14,200
Rig - Ocean Valiant
Liabilities assumed:
Proceeds from sale of property, plant, and equipment		$ 5,600	5,600
Diamond Offshore Drilling, Inc.
Business Acquisition [Line Items]
Acquisition related costs			$ 84,500
Fair value of Ordinary Shares transferred to legacy Diamond shareholders	$ 857,678
Fair value of replacement Diamond RSU Awards attributable to the purchase price	22,263
Cash paid to legacy Diamond shareholders	583,152
Cash paid to terminate the Diamond Revolving Credit Facility	308
Cash paid to settle contingent success fees	17,316
Cash paid for retention bonuses	4,422
Cash paid for short-term incentive plans	5,086
Total purchase price consideration	1,490,225
Assets acquired:
Cash and cash equivalents	193,243
Accounts receivable, net	193,194
Taxes receivable	6,971
Prepaid expenses and other current assets	69,781
Total current assets	463,189
Property and equipment, net	1,817,986
Assets held for sale	5,300
Other assets	193,289
Total assets acquired	2,479,764
Liabilities assumed:
Accounts payable	82,805
Accrued payroll and related costs	36,791
Taxes payable	3,699
Interest payable	19,750
Other current liabilities	137,788
Total current liabilities	280,833
Long-term debt	580,250
Deferred income taxes	184
Noncurrent contract liabilities	27,663
Other liabilities	100,609
Total liabilities assumed	989,539
Net assets acquired	1,490,225
Diamond Offshore Drilling, Inc. | Diamond Principal Debt
Liabilities assumed:
Long-term debt	$ 550,000