Investments - Equity Investments with Readily Determinable Fair Values, Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) tranche	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Schedule of Investments [Line Items]
Unrealized gain	$ (2,808)	$ 200
Gain from sales of investment shares	92	0
Adyen
Schedule of Investments [Line Items]
Value of shares purchased	$ 1,100
Warrant
Schedule of Investments [Line Items]
Number of tranches | tranche	4
Kakao Bank
Schedule of Investments [Line Items]
Unrealized gain	$ 403	239	$ 0
Gain from sales of investment shares	83	0	0
Total cash consideration from sale of equity securities	114
Carrying value of investment	684
Adyen
Schedule of Investments [Line Items]
Unrealized gain	(10)	$ 0	$ 0
Carrying value of investment	1,061
Payments to acquire equity investment with readily determinable fair value	$ 110