Other Financial Statement Details - Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Interest income	$ 15	$ 17	$ 43	$ 72
Interest expense	(58)	(58)	(173)	(150)
Net gains on strategic investments	173	209	336	973
Other	(8)	(1)	(25)	(15)
Other income (expense), net	$ 122	$ 167	$ 181	$ 880