Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ (627)	$ (608)	$ (1,858)	$ (1,764)
Income before income taxes	390	948	1,573	2,202
Provision for income taxes	(80)	(228)	(339)	(437)
Interest and other, net	(142)	392	(129)	661
Net income	310	721	1,230	1,770
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	15	9	42	(30)
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	19	12	52	(37)
Cost of net revenues	0	0	1	0
Income before income taxes	19	12	53	(37)
Provision for income taxes	(4)	(3)	(11)	8
Net income	15	9	42	(29)
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	0	0	0	(1)
Net income	$ 0	$ 0	$ 0	$ (1)