Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Revenue	$ (1,224)	$ (1,022)	$ (3,587)	$ (2,992)
Sales and marketing	(755)	(726)	(2,223)	(2,120)
Product development	(433)	(389)	(1,318)	(1,157)
General and administrative	(415)	(369)	(1,242)	(1,131)
Interest and other, net	74	5	89	74
Provision for income taxes	184	75	432	348
Net income	689	597	2,006	1,859
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	4		5
Unrealized Gains (Losses) on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue by reportable segment	6		9
Cost of Revenue	(1)		(2)
Sales and marketing	0		(1)
Product development	(1)		(4)
General and administrative	0		(1)
Income (loss) before taxes	4		1
Provision for income taxes	0		0
Net income	4		1
Unrealized Gains on Investments | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before taxes	0		4
Interest and other, net	0		4
Provision for income taxes	0		0
Net income	$ 0		$ 4