Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues	$ (1,348)	$ (1,181)	$ (2,585)	$ (2,330)
Sales and marketing	(836)	(885)	(1,600)	(1,661)
Product development	(485)	(468)	(935)	(915)
General and administrative	(683)	(448)	(1,322)	(900)
Interest and other, net	126	10	135	5
Provision for income taxes	(185)	(144)	(323)	(3,360)
Net income (loss)	83	676	709	(1,650)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	73	(20)	142	(34)
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	62	(23)	112	(40)
Cost of net revenues	5	(1)	11	(2)
Sales and marketing	1	0	2	0
Product development	5	(2)	16	(4)
General and administrative	1	(1)	3	(2)
Total, before income taxes	74	(27)	144	(48)
Provision for income taxes	0	0	0	0
Net income (loss)	74	(27)	144	(48)
Unrealized Gains on Investments | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, before income taxes	(1)	7	(2)	14
Interest and other, net	(1)	7	(2)	14
Provision for income taxes	0	0	0	0
Net income (loss)	$ (1)	$ 7	$ (2)	$ 14