Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ (433)	$ (413)	$ (1,278)	$ (1,221)
Sales and marketing	(565)	(624)	(1,672)	(1,815)
Product development	(241)	(246)	(694)	(747)
General and administrative	(207)	(203)	(862)	(678)
Interest and other, net	87	17	221	32
Income from continuing operations before income taxes	665	613	1,756	1,777
Provision for income taxes	(120)	(104)	(332)	(3,371)
Income (loss) from continuing operations	545	509	1,424	(1,594)
Total, from discontinued operations net of income taxes	(6)	164	(176)	617
Net income (loss)	539	673	1,248	(977)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	43	5	185	(29)
Unrealized Gains (Losses) on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Revenues	0	0	0	0
Cost of net revenues	7	0	18	(2)
Sales and marketing	2	0	4	0
Product development	9	0	25	(4)
General and administrative	1	0	4	(2)
Income from continuing operations before income taxes	19	0	51	(8)
Provision for income taxes	0	0	0	0
Income (loss) from continuing operations	19	0	51	(8)
Total, from discontinued operations net of income taxes	21	(16)	133	(56)
Net income (loss)	40	(16)	184	(64)
Unrealized Gains on Investments | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net	3	21	1	35
Income from continuing operations before income taxes	3	21	1	35
Provision for income taxes	0	0	0	0
Net income (loss)	$ 3	$ 21	$ 1	$ 35