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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Cash flows from operating activities    
Net loss $ (7) $ (14)
 Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 71 55
Equity in earnings of equity method investment (net of tax) (4) (8)
Deferred tax expense 17 3
Unrealized gain on foreign exchange 0 (1)
Amortization of bond issuance costs 1 1
Share based compensation expense 1 4
Other 0 12
Other cash movements in operating activities    
Additions to long-term maintenance (38) (54)
Changes in operating assets and liabilities    
Accounts receivable, net (52) 42
Trade accounts payable 11 (35)
Prepaid expenses 2 (2)
Deferred revenue (10) (9)
Deferred contract costs (35) 6
Related party receivables (7) 0
Other assets (12) (2)
Other liabilities 40 (25)
Net cash used in operating activities (22) (27)
Cash flows from investing activities    
Additions to drilling units and equipment (13) (45)
Other 0 (4)
Net cash used in investing activities (13) (49)
Cash flows from financing activities    
Taxes withheld on employee stock transactions (1) 0
Net cash used in financing activities (1) 0
Effect of exchange rate changes on cash 0 1
Net decrease in cash and cash equivalents, including restricted cash (36) (75)
Cash and cash equivalents, including restricted cash, at beginning of the period 365 505
Cash and cash equivalents, including restricted cash, at the end of period $ 329 $ 430