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Goodwill - Summary of Changes in the Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill [Line Items] |  |  |  |  |
Beginning balance | $ 20,624 | $ 24,846 | [1] |  |
Goodwill reclassified as assets to held for sale | (18) | (27) |  |  |
Goodwill impairment | 0 | (4,628) |  | $ 0 |
Translation differences | (566) | 433 |  |  |
Ending balance | 20,040 | 20,624 |  | 24,846 | [1]
North America [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance | 6,473 | 11,091 | [1] |  |
Goodwill impairment |  | (4,628) |  |  |
Translation differences | 1 | 10 |  |  |
Ending balance | 6,474 | 6,473 |  | 11,091 | [1]
Europe [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance | 9,102 | 8,536 | [1] |  |
Goodwill reclassified as assets to held for sale | (7) | (8) |  |  |
Translation differences | (551) | 574 |  |  |
Ending balance | 8,544 | 9,102 |  | 8,536 | [1]
International Markets [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance | 2,362 | 2,532 | [1] |  |
Goodwill reclassified as assets to held for sale |  | (19) |  |  |
Translation differences | (34) | (151) |  |  |
Ending balance | 2,328 | 2,362 |  | 2,532 | [1]
Other [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Beginning balance | 2,687 | 2,687 | [1] |  |
Goodwill reclassified as assets to held for sale | (11) |  |  |  |
Translation differences | 18 |  |  |  |
Ending balance | $ 2,694 | $ 2,687 |  | $ 2,687 | [1]
[1] | Accumulated goodwill impairment as of December 31, 2021, December 31, 2020 and December 31, 2019 was approximately $25.6 billion, $25.6 billion and $21.0 billion, respectively.

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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: 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=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: 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=121556970&loc=d3e13816-109267 + Details
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