Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 17,599	$ 15,037
Other comprehensive income (loss) before reclassifications	7	11
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(20)	18
Ending balance	18,248	16,286
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(606)	(589)
Other comprehensive income (loss) before reclassifications	(27)	5
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	0	0
Ending balance	(633)	(584)
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	7	(5)
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(2)	2
Ending balance	8	(8)
Unrealized gain (loss) on forward contracts
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	25	(28)
Other comprehensive income (loss) before reclassifications	27	11
Amounts reclassified from accumulated other comprehensive income (loss) into earnings	(18)	16
Ending balance	34	(1)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(578)	(622)
Ending balance	$ (591)	$ (593)