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Business Segments - Other Items by Segment (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]
Total other items	$ 1	$ 9	$ 51	$ 130
Operating Segments [Member] | Rig Systems [Member]
Segment Reporting Information [Line Items]
Total other items		4		16
Operating Segments [Member] | Wellbore Technologies [Member]
Segment Reporting Information [Line Items]
Total other items		2	9	39
Operating Segments [Member] | Completion & Production Solutions [Member]
Segment Reporting Information [Line Items]
Total other items	(1)	1	6	73
Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Total other items	$ 2	$ 2	$ 36	$ 2

X

- Definition

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

+ 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 210.5-03.3)

-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 3

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration