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Business Segments - Operating Results by Segment (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 5,601 | $ 4,734 | $ 10,908 | $ 9,037
Total Operating Profit | 769 | 879 | 1,520 | 1,756
Percentage as of operating profit to revenue | 13.70% | 18.60% | 13.90% | 19.40%
Operating Segments [Member] | Rig Technology [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 2,833 | 2,405 | 5,461 | 4,664
Total Operating Profit | 574 | 554 | 1,124 | 1,101
Percentage as of operating profit to revenue | 20.30% | 23.00% | 20.60% | 23.60%
Operating Segments [Member] | Petroleum Services & Supplies [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,749 | 1,776 | 3,450 | 3,480
Total Operating Profit | 273 | 390 | 528 | 778
Percentage as of operating profit to revenue | 15.60% | 22.00% | 15.30% | 22.40%
Operating Segments [Member] | Distribution & Transmission [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,295 | 780 | 2,522 | 1,344
Total Operating Profit | 58 | 46 | 121 | 89
Percentage as of operating profit to revenue | 4.50% | 5.90% | 4.80% | 6.60%
Unallocated/Eliminations [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (276) | (227) | (525) | (451)
Total Operating Profit | $ (136) | $ (111) | $ (253) | $ (212)

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