Accumulated Other Comprehensive Income - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of net revenues									$ 2,007	$ 1,771	$ 1,663
Sales and marketing									2,368	2,267	2,442
Product development									1,114	923	983
General and administrative									900	1,122	889
Interest and other, net									1,326	209	39
Income from continuing operations before income taxes									3,651	2,406	2,515
Income tax benefit (provision)									3,634	(459)	(3,380)
Income (loss) from continuing operations	$ 5,948	$ 418	$ 437	$ 482	$ 523	$ 545	$ 430	$ 449	7,285	1,947	(865)
Income (loss) from discontinued operations, net of income taxes	(12)	(5)	(2)	0	(46)	(6)	(347)	177	(19)	(222)	911
Net income	$ 5,936	$ 413	$ 435	$ 482	$ 477	$ 539	$ 83	$ 626	7,266	1,725	$ 46
Total reclassifications for the period									926	205
Amount of Gain (Loss) Reclassified from 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									4	24
Sales and marketing									0	5
Product development									2	34
General and administrative									1	8
Interest and other, net									101	0
Income from continuing operations before income taxes									108	71
Income tax benefit (provision)									0	0
Income (loss) from continuing operations									108	71
Income (loss) from discontinued operations, net of income taxes									0	133
Net income									108	204
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income | Gains (losses) on investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net									1,299	1
Income from continuing operations before income taxes									1,299	1
Income tax benefit (provision)									(481)	0
Net income									$ 818	$ 1