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Business Segments - Other Items by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]    
Total other items $ 141 $ 122
Operating Segments [Member] | Rig Systems [Member]    
Segment Reporting Information [Line Items]    
Total other items 52 40
Operating Segments [Member] | Rig Aftermarket [Member]    
Segment Reporting Information [Line Items]    
Total other items 8 8
Operating Segments [Member] | Wellbore Technologies [Member]    
Segment Reporting Information [Line Items]    
Total other items 38 45
Operating Segments [Member] | Completion & Production Solutions [Member]    
Segment Reporting Information [Line Items]    
Total other items 34 $ 29
Eliminations and Corporate Costs [Member]    
Segment Reporting Information [Line Items]    
Total other items $ 9