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Business Segments - Operating Results by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Revenue	$ 5,789	$ 5,319	$ 16,697	$ 14,356
Total Operating Profit	946	898	2,466	2,654
Percentage as of operating profit to revenue	16.30%	16.90%	14.80%	18.50%
Operating Segments [Member] | Rig Technology [Member]
Segment Reporting Information [Line Items]
Revenue	2,945	2,547	8,406	7,211
Total Operating Profit	706	598	1,830	1,699
Percentage as of operating profit to revenue	24.00%	23.50%	21.80%	23.60%
Operating Segments [Member] | Petroleum Services & Supplies [Member]
Segment Reporting Information [Line Items]
Revenue	1,809	1,717	5,259	5,197
Total Operating Profit	321	383	849	1,161
Percentage as of operating profit to revenue	17.70%	22.30%	16.10%	22.30%
Operating Segments [Member] | Distribution & Transmission [Member]
Segment Reporting Information [Line Items]
Revenue	1,342	1,315	3,864	2,659
Total Operating Profit	74	42	195	131
Percentage as of operating profit to revenue	5.50%	3.20%	5.00%	4.90%
Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	(307)	(260)	(832)	(711)
Total Operating Profit	$ (155)	$ (125)	$ (408)	$ (337)

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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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