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Business Segments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Revenue	$ 5,319	$ 3,740	$ 14,356	$ 10,399
Total Operating Profit	898	772	2,654	2,089
Percentage as of operating profit to revenue	16.90%	20.60%	18.50%	20.10%
Rig Technology [Member]
Segment Reporting Information [Line Items]
Revenue	2,547	1,970	7,211	5,472
Total Operating Profit	598	523	1,699	1,456
Percentage as of operating profit to revenue	23.50%	26.50%	23.60%	26.60%
Petroleum Services & Supplies [Member]
Segment Reporting Information [Line Items]
Revenue	1,717	1,460	5,197	4,084
Total Operating Profit	383	298	1,161	777
Percentage as of operating profit to revenue	22.30%	20.40%	22.30%	19.00%
Distribution & Transmission [Member]
Segment Reporting Information [Line Items]
Revenue	1,315	480	2,659	1,313
Total Operating Profit	42	37	131	90
Percentage as of operating profit to revenue	3.20%	7.70%	4.90%	6.90%
Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	(260)	(170)	(711)	(470)
Total Operating Profit	$ (125)	$ (86)	$ (337)	$ (234)

X

- Definition

Percentage as of operating profit to revenue.

+ References

No definition available.

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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=6880815&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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