Strategic Investments (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 272
Equity Method Investments	319	$ 264
Measurement alternative investments (1)	183	171
Equity Securities, FV-NI	414	1
Notes receivable	2	23
Investments	918	$ 458
Unrealized Gain (Loss) on Investments	$ 363

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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