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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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- Definition

Percentage as of operating profit to revenue.

+ References

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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