Investments - Equity Investments without Readily Determinable Fair Values, Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Upward adjustments for observable price changes	$ 41	$ 239
Downward adjustments for impairment	170	40
Cumulative upward adjustments for observable price changes	41
Cumulative downward adjustments for price changes and impairment	291
Cash investment to acquire ownership interest	0	0	$ 160
Strategic Investments
Schedule of Investments [Line Items]
Upward adjustments for observable price changes	41
Downward adjustments for impairment	170
Paytm Mall
Schedule of Investments [Line Items]
Impairment on investment without readily determinable fair value	160	0	$ 0
Equity investment	$ 0
Kakao Bank
Schedule of Investments [Line Items]
Upward adjustments for observable price changes		239
Cash investment to acquire ownership interest		$ 18

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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