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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 |

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