Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ (498)	$ (433)	$ (1,468)	$ (1,278)
Sales and marketing	(600)	(565)	(1,760)	(1,672)
Product development	(288)	(241)	(822)	(694)
General and administrative	(224)	(207)	(651)	(862)
Interest and other, net	(9)	87	(40)	221
Income from continuing operations before income taxes	533	665	1,647	1,756
Provision for income taxes	(115)	(120)	(310)	(332)
Income from continuing operations	418	545	1,337	1,424
Total, from discontinued operations net of income taxes	(5)	(6)	(7)	(176)
Net income	413	539	1,330	1,248
Total reclassifications for the period	24	43	27	185
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	0	7	1	18
Sales and marketing	0	2	0	4
Product development	1	9	3	25
General and administrative	1	1	1	4
Interest and other, net	25	0	58	0
Income from continuing operations before income taxes	27	19	63	51
Provision for income taxes	0	0	0	0
Income from continuing operations	27	19	63	51
Total, from discontinued operations net of income taxes	0	21	0	133
Net income	27	40	63	184
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	(3)	3	(36)	1
Income from continuing operations before income taxes	(3)	3	(36)	1
Provision for income taxes	0	0	0	0
Net income	$ (3)	$ 3	$ (36)	$ 1