Identifiable Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Millions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Goodwill [Roll Forward] | ||||||||
| Beginning balance | $ 48,202 | $ 42,927 | ||||||
| Additions | [1] | 5,411 | ||||||
| Additions, measurement period adjustments | [2] | 727 | ||||||
| Other | [3] | 648 | (136) | |||||
| Ending balance | $ 49,577 | $ 48,202 | ||||||
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| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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