Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 17,599	$ 15,037
Other comprehensive income (loss) before reclassifications	4	12
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(12)	10
Ending balance	17,831	15,331
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(606)	(589)
Other comprehensive income (loss) before reclassifications	(4)	(5)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	0	0
Ending balance	(610)	(594)
Unrealized gain (loss) on available-for- sale securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	3	(5)
Other comprehensive income (loss) before reclassifications	2	(3)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(1)	1
Ending balance	4	(7)
Unrealized gain (loss) on forward contracts
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	25	(28)
Other comprehensive income (loss) before reclassifications	6	20
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(11)	9
Ending balance	20	1
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(578)	(622)
Ending balance	$ (586)	$ (600)