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Business Segments - Business Segments (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 5,587 | $ 4,863 | $ 15,731 | $ 13,919
Total Operating Profit | 988 | 884 | 2,700 | 2,290
Percentage as of operating profit to revenue | 17.70% | 18.20% | 17.20% | 16.50%
Operating Segments [Member] | Rig Systems [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 2,659 | 2,061 | 7,287 | 6,053
Total Operating Profit | 533 | 388 | 1,485 | 1,141
Percentage as of operating profit to revenue | 20.00% | 18.80% | 20.40% | 18.90%
Operating Segments [Member] | Rig Aftermarket [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 837 | 712 | 2,372 | 1,933
Total Operating Profit | 229 | 202 | 637 | 533
Percentage as of operating profit to revenue | 27.40% | 28.40% | 26.90% | 27.60%
Operating Segments [Member] | Wellbore Technologies [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,469 | 1,395 | 4,193 | 3,840
Total Operating Profit | 278 | 306 | 762 | 672
Percentage as of operating profit to revenue | 18.90% | 21.90% | 18.20% | 17.50%
Operating Segments [Member] | Completion & Production Solutions [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,191 | 1,095 | 3,320 | 3,154
Total Operating Profit | 185 | 175 | 479 | 438
Percentage as of operating profit to revenue | 15.50% | 16.00% | 14.40% | 13.90%
Unallocated/Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (569) | (400) | (1,441) | (1,061)
Total Operating Profit | $ (237) | $ (187) | $ (663) | $ (494)

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