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Business Segments - Other Costs by Segment (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Total other costs | $ 9 | $ 64
Operating Segments [Member] | Rig Systems [Member] |  |
Segment Reporting Information [Line Items] |  |
Total other costs |  | 2
Operating Segments [Member] | Rig Aftermarket [Member] |  |
Segment Reporting Information [Line Items] |  |
Total other costs | 0 |
Operating Segments [Member] | Wellbore Technologies [Member] |  |
Segment Reporting Information [Line Items] |  |
Total other costs | 3 | 26
Operating Segments [Member] | Completion & Production Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Total other costs | $ 6 | $ 36

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- 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

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration