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Asset Impairments - Goodwill Identified, by Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |  |  |
Beginning Balance |  |  | $ 6,264 | $ 6,227
Goodwill acquired and adjusted during period |  |  | 62 | 102
Impairment | $ (410) | $ (3,099) | (3,509) |
Currency translation adjustments |  |  | (10) | (65)
Ending Balance | 2,807 |  | 2,807 | 6,264
Wellbore Technologies [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance |  |  | 3,011 | 2,956
Goodwill acquired and adjusted during period |  |  | 9 | 64
Impairment |  |  | (2,178) |
Currency translation adjustments |  |  | 1 | (9)
Ending Balance | 843 |  | 843 | 3,011
Completion & Production Solutions [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance |  |  | 2,041 | 2,122
Goodwill acquired and adjusted during period |  |  | 40 | (33)
Impairment |  |  | (1,019) |
Currency translation adjustments |  |  | (8) | (48)
Ending Balance | 1,054 |  | 1,054 | 2,041
Rig Technologies [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Beginning Balance |  |  | 1,212 | 1,149
Goodwill acquired and adjusted during period |  |  | 13 | 71
Impairment |  |  | (312) |
Currency translation adjustments |  |  | (3) | (8)
Ending Balance | $ 910 |  | $ 910 | $ 1,212

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 Reference 2: 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=118932676&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266 + Details
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