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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) $ in Millions | 9 Months Ended
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Sep. 30, 2019 USD ($)
Goodwill [Line Items] |  |
Beginning balance | $ 24,917 | [1]
Goodwill disposal | (28) |
Translation differences | (232) |
Ending balance | 24,657 | [1]
North America [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 11,098 | [1]
Goodwill disposal | (23) |
Translation differences | 11 |
Ending balance | 11,086 | [1]
Europe [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 8,653 | [1]
Goodwill disposal | (5) |
Translation differences | (300) |
Ending balance | 8,348 | [1]
International Markets [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 2,479 | [1]
Translation differences | 57 |
Ending balance | 2,536 | [1]
Other [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 2,687 | [1]
Ending balance | $ 2,687 | [1]
[1] | Accumulated goodwill impairment as of September 30, 2019 and January 1, 2019 was approximately $21.0 billion.

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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 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 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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