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Business Segments - Other Items by Segment (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Segment Reporting Information [Line Items]        
Total other items $ 117 $ 17 $ 258 $ 139
Operating Segments [Member] | Rig Systems [Member]        
Segment Reporting Information [Line Items]        
Total other items 23 3 75 43
Operating Segments [Member] | Rig Aftermarket [Member]        
Segment Reporting Information [Line Items]        
Total other items 5 2 13 10
Operating Segments [Member] | Wellbore Technologies [Member]        
Segment Reporting Information [Line Items]        
Total other items 50 9 88 54
Operating Segments [Member] | Completion & Production Solutions [Member]        
Segment Reporting Information [Line Items]        
Total other items 38 $ 3 72 $ 32
Eliminations and Corporate Costs [Member]        
Segment Reporting Information [Line Items]        
Total other items $ 1   $ 10