Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Other Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues	$ 2,544	$ 2,137
Other income (expense), net	15	(1)
Income before income taxes	422	321
Income tax expense	57	66
Net income	365	255
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	29	50
Gains on cash flow hedges-foreign exchange contracts | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues	32	50
Unrealized losses on investments | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	(3)	0
Income before income taxes	29	50
Income tax expense	$ 0	$ 0