CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net revenues	$ 2,099	$ 2,150	$ 6,270	$ 6,467
Cost of net revenues	433	413	1,278	1,221
Gross profit	1,666	1,737	4,992	5,246
Operating expenses:
Sales and marketing	565	624	1,672	1,815
Product development	241	246	694	747
General and administrative	207	203	862	678
Provision for transaction losses	65	58	199	196
Amortization of acquired intangible assets	10	10	30	65
Total operating expenses	1,088	1,141	3,457	3,501
Income from operations	578	596	1,535	1,745
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)
Income (loss) from discontinued operations, net of income taxes	(6)	164	(176)	617
Net income (loss)	$ 539	$ 673	$ 1,248	$ (977)
Income (loss) per share - basic:
Continuing operations (in usd per share)	$ 0.45	$ 0.41	$ 1.17	$ (1.27)
Discontinued operations (in usd per share)	0.00	0.13	(0.14)	0.49
Net income (loss) per share - basic (usd per share)	0.45	0.54	1.03	(0.78)
Income (loss) per share - diluted:
Continuing operations (in usd per share)	0.45	0.41	1.16	(1.27)
Discontinued operations (in usd per share)	0.00	0.13	(0.14)	0.49
Net income (loss) per share - diluted (in usd per share)	$ 0.45	$ 0.54	$ 1.02	$ (0.78)
Weighted average shares:
Basic (in shares)	1,210	1,242	1,214	1,258
Diluted (in shares)	1,223	1,251	1,226	1,258