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Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | $ 25,118 | $ 24,990
Acquisitions | 39 | 94
Business divestiture | (175) |
Impact of changes in exchange rates | (51) | 34
Goodwill, Ending Balance | 24,931 | 25,118
Cameron |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 5,447 | 5,417
Acquisitions |  | 24
Impact of changes in exchange rates | (8) | 6
Goodwill, Ending Balance | 5,439 | 5,447
Operating Segments | Reservoir Characterization |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 4,848 | 4,820
Acquisitions | 39 | 21
Business divestiture | (175) |
Impact of changes in exchange rates | (9) | 7
Goodwill, Ending Balance | 4,703 | 4,848
Operating Segments | Drilling |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 10,126 | 10,114
Acquisitions |  | 3
Impact of changes in exchange rates | (15) | 9
Goodwill, Ending Balance | 10,111 | 10,126
Operating Segments | Production |  |
Goodwill [Line Items] |  |
Goodwill, Beginning Balance | 4,697 | 4,639
Acquisitions |  | 46
Impact of changes in exchange rates | (19) | 12
Goodwill, Ending Balance | $ 4,678 | $ 4,697

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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 increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments 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 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 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 (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of divestiture 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 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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