v3.21.1
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Operating revenues    
Contract drilling revenues $ 653 $ 759
Revenue from Contract with Customer, Product and Service [Extensible List] us-gaap:OilAndGasServiceMember us-gaap:OilAndGasServiceMember
Costs and expenses    
Operating and maintenance $ 435 $ 540
Cost, Product and Service [Extensible List] us-gaap:OilAndGasServiceMember us-gaap:OilAndGasServiceMember
Depreciation and amortization $ 187 $ 206
General and administrative 39 43
Total costs and expenses 661 789
Loss on impairment   (168)
Lloss on disposal of assets, net (59) (1)
Operating loss (67) (199)
Other income (expense), net    
Interest income 3 9
Interest expense, net of amounts capitalized (115) (160)
Gain (loss) on retirement of debt 51 (57)
Other, net 9 12
Total other income (expense), net (52) (196)
Loss before income tax expense (119) (395)
Income tax benefit (21) (4)
Net loss (98) (391)
Net income attributable to noncontrolling interest 1 1
Net loss attributable to controlling interest $ (99) $ (392)
Loss per share, basic and diluted (in dollars per share) $ (0.16) $ (0.64)
Weighted average shares, basic and diluted (in shares) 617 614