Investments - Carrying Value of Equity Investments Without Readily Determinable Fair Values (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Equity Securities without Readily Determinable Fair Value [Roll Forward]
Carrying value, beginning of period	$ 539	$ 307
Additions	5	22
Upward adjustments for observable price changes	41	239
Downward adjustments for observable price changes and impairment	(170)	(40)
Transfers out from investments without readily determinable fair values	(312)	0
Foreign currency translation and other	(18)	11
Carrying value, end of period	$ 85	$ 539

Equity Securities Without Readily Determinable Fair Value, Transfers Out

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Equity Securities without Readily Determinable Fair Value, Additions

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Equity Securities without Readily Determinable Fair Value, Foreign Currency Translation

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- Definition

Equity Securities without Readily Determinable Fair Value [Roll Forward]

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714

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- Definition

Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714

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- Definition

Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714

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