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Summary of Significant Accounting Policies - Identified Intangible Assets Identified by Segment (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | $ 4,743 | $ 4,073
Additions to intangible assets | 696 | 981
Amortization | (363) | (305)
Currency translation adjustments and other | (21) | (6)
Ending Balance | 5,055 | 4,743
Rig Technology [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 1,112 | 654
Additions to intangible assets | 101 | 545
Amortization | (90) | (76)
Currency translation adjustments and other | 2 | (11)
Ending Balance | 1,125 | 1,112
Petroleum Services & Supplies [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 3,550 | 3,391
Additions to intangible assets | 421 | 380
Amortization | (259) | (224)
Currency translation adjustments and other | (24) | 3
Ending Balance | 3,688 | 3,550
Distribution & Transmission [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 81 | 28
Additions to intangible assets | 174 | 56
Amortization | (14) | (5)
Currency translation adjustments and other | 1 | 2
Ending Balance | $ 242 | $ 81

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- Definition Intangible Assets Acquired During Period. + References No definition available. + Details
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- Definition Intangible Assets Translation And Purchase Accounting Adjustments. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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