Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 15,037	$ 12,805
Other comprehensive income (loss) before reclassifications	25	(8)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	19	5
Ending balance	17,599	15,037
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(589)	(624)
Other comprehensive income (loss) before reclassifications	(17)	37
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	0	(2)
Ending balance	(606)	(589)
Unrealized gain (loss) on available-for- sale securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(5)	(3)
Other comprehensive income (loss) before reclassifications	(2)	(6)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	10	4
Ending balance	3	(5)
Unrealized gain (loss) on forward contracts
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(28)	8
Other comprehensive income (loss) before reclassifications	44	(39)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	9	3
Ending balance	25	(28)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(622)	(619)
Ending balance	$ (578)	$ (622)