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Goodwill and Intangible Assets - Identified Intangible Assets Identified by Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | $ 3,301 | $ 3,530
Additions to intangible assets | 99 | 61
Amortization | (341) | (339)
Currency translation adjustments | (39) | 49
Ending Balance | 3,020 | 3,301
Wellbore Technologies [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 1,883 | 2,064
Additions to intangible assets | 41 | 18
Amortization | (201) | (208)
Currency translation adjustments | 12 | 9
Ending Balance | 1,735 | 1,883
Completion & Production Solutions [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 1,160 | 1,191
Additions to intangible assets | 3 | 41
Amortization | (111) | (108)
Currency translation adjustments | (47) | 36
Ending Balance | 1,005 | 1,160
Rig Technologies [Member] |  |
Intangible Asset Excluding Goodwill [Line Items] |  |
Beginning Balance | 258 | 275
Additions to intangible assets | 55 | 2
Amortization | (29) | (23)
Currency translation adjustments | (4) | 4
Ending Balance | $ 280 | $ 258

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + 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://fasb.org/us-gaap/role/ref/legacyRef -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=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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