Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ 515	$ 477
Sales and marketing	562	538
Product development	278	239
General and administrative	245	209
Interest and other, net	12	(23)
Income before income taxes	558	591
Provision for income taxes	477	(109)
Net income	1,035	482
Total reclassifications for the period	32	11
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]
Cost of net revenues	2	2
Sales and marketing	1	0
Product development	3	2
General and administrative	1	0
Interest and other, net	13	12
Income before income taxes	20	16
Provision for income taxes	0	0
Net income	20	16
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	12	(5)
Income before income taxes	12	(5)
Provision for income taxes	0	0
Net income	$ 12	$ (5)