Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ (630)	$ (597)	$ (1,231)	$ (1,156)
Income before income taxes	510	707	1,183	1,254
Provision for income taxes	(107)	(69)	(259)	(209)
Interest and other, net	(51)	301	13	269
Total, net of income taxes	402	642	920	1,049
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, net of income taxes	11	(16)	27	(39)
Reclassification out of Accumulated Other Comprehensive Income | Gains (losses) on cash flow hedges - foreign exchange contracts | Foreign Exchange Contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Revenues	13	(21)	33	(49)
Cost of net revenues	1	0	1	0
Income before income taxes	14	(21)	34	(49)
Provision for income taxes	(3)	5	(7)	11
Total, net of income taxes	$ 11	$ (16)	$ 27	(38)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains (losses) on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net				(1)
Total, net of income taxes				$ (1)