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Business Segments - Business Segments (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Revenue | $ 4,889 | $ 4,376
Total Operating Profit | 799 | 693
Percentage as of operating profit to revenue | 16.30% | 15.80%
Operating Segments [Member] | Rig Systems [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 2,256 | 1,911
Total Operating Profit | 451 | 370
Percentage as of operating profit to revenue | 20.00% | 19.40%
Operating Segments [Member] | Rig Aftermarket [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 750 | 551
Total Operating Profit | 191 | 142
Percentage as of operating profit to revenue | 25.50% | 25.80%
Operating Segments [Member] | Wellbore Technologies [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,278 | 1,223
Total Operating Profit | 221 | 182
Percentage as of operating profit to revenue | 17.30% | 14.90%
Operating Segments [Member] | Completion & Production Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | 1,002 | 1,002
Total Operating Profit | 137 | 136
Percentage as of operating profit to revenue | 13.70% | 13.60%
Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenue | (397) | (311)
Total Operating Profit | $ (201) | $ (137)

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