Other Financial Statement Details - Reclassifications Out Of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net revenues	$ 3,683	$ 3,239	$ 11,225	$ 9,350
Other income (expense), net	43	28	94	52
Income before income taxes	533	451	1,690	1,336
Income tax expense	(97)	(71)	(217)	(161)
Net income	436	380	1,473	1,175
Amount of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income before income taxes	8	(13)	(66)	45
Income tax expense	0	0	0	0
Net income	8	(13)	(66)	45
Amount of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains (losses) on cash flow hedges-foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net revenues	7	(13)	(66)	46
Amount of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) | Unrealized gains (losses) on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other income (expense), net	$ 1	$ 0	$ 0	$ (1)