Acquisitions - Schedule of Allocation of Purchase Price (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
	Sep. 04, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Business Acquisition [Line Items]
Acquisition related costs		$ 69,214			$ 12,966	$ 89,163	$ 47,049
Rig
Liabilities assumed:
Proceeds from sale of property, plant, and equipment		$ 5,600	$ 25,000	$ 21,500
Diamond Offshore Drilling, Inc.
Business Acquisition [Line Items]
Acquisition related costs						$ 69,400
Fair value of Noble 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 RCF	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	209,826
Accounts receivable, net	193,194
Taxes receivable	6,971
Prepaid expenses and other current assets	74,739
Total current assets	484,730
Property, plant, and equipment, net	1,834,890
Assets held for sale	5,300
Other assets	172,936
Total assets acquired	2,497,856
Liabilities assumed:
Accounts payable	82,805
Accrued payroll and related costs	36,791
Taxes payable	28,629
Interest payable	19,750
Other current liabilities	132,142
Total current liabilities	300,117
Long-term debt	580,250
Deferred income taxes	184
Noncurrent contract liabilities	27,663
Other liabilities	99,417
Total liabilities assumed	1,007,631
Net assets acquired	1,490,225
Diamond Offshore Drilling, Inc. | Diamond Principal Debt
Liabilities assumed:
Long-term debt	$ 550,000