Strategic Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Schedule of Investments [Line Items]
Equity method investments	$ 264	$ 264	$ 319
Measurement alternative investments(1)	175	175	183
Equity Securities, FV-NI	176	176	414
Notes receivable	0	0	2
Investments	616	616	$ 918
Equity Securities, FV-NI, Gain (Loss)	(8)	(154)
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 314	$ 314

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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Sum of the carrying amounts as of the balance sheet date of all investments.

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