Goodwill and Intangible Assets - Changes in Goodwill and Intangible Assets (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Goodwill
Balance at January 1, 2021	$ 21,895
Currency	(332)
Acquisitions	382
Balance at March 31, 2021	21,945
Intangible Assets, at cost
Balance at January 1, 2021	20,399
Currency	(217)
Acquisitions	279
Balance at March 31, 2021	$ 20,461

Finite-lived and Indefinite-lived Intangible Assets

No definition available.

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- Definition

Intangible Assets Acquired Other Than Goodwill

+ References

No definition available.

+ Details

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- Definition

Reflects net changes to intangible assets for foreign currency translation adjustments.

+ References

No definition available.

+ Details

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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))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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-Publisher FASB
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-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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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
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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

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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
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

+ Details

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