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Business Segments - Business Segments (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]    
Total revenue $ 2,189 $ 4,820
Total operating profit (loss) $ (189) $ 570
Percentage as of operating profit (loss) to revenue (8.60%) 11.80%
Operating Segments [Member] | Rig Systems [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 926 $ 2,523
Total operating profit (loss) $ 67 $ 477
Percentage as of operating profit (loss) to revenue 7.20% 18.90%
Operating Segments [Member] | Rig Aftermarket [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 391 $ 719
Total operating profit (loss) $ 69 $ 204
Percentage as of operating profit (loss) to revenue 17.60% 28.40%
Operating Segments [Member] | Wellbore Technologies [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 631 $ 1,171
Total operating profit (loss) $ (91) $ 95
Percentage as of operating profit (loss) to revenue (14.40%) 8.10%
Operating Segments [Member] | Completion & Production Solutions [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ 558 $ 948
Total operating profit (loss) $ (38) $ 88
Percentage as of operating profit (loss) to revenue (6.80%) 9.30%
Eliminations and Corporate Costs [Member]    
Segment Reporting Information [Line Items]    
Total revenue $ (317) $ (541)
Total operating profit (loss) $ (196) $ (294)