CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenues	$ 2,217	$ 2,137
Cost of net revenues	515	477
Gross profit	1,702	1,660
Operating expenses:
Sales and marketing	562	538
Product development	278	239
General and administrative	245	209
Provision for transaction losses	62	52
Amortization of acquired intangible assets	9	8
Total operating expenses	1,156	1,046
Income from operations	546	614
Interest and other, net	12	(23)
Income before income taxes	558	591
Income tax benefit (provision)	477	(109)
Net income	$ 1,035	$ 482
Net income (loss) per share:
Net income per share - basic (in usd per share)	$ 0.96	$ 0.42
Net income per share - diluted (in usd per share)	$ 0.94	$ 0.41
Weighted-average shares:
Basic (in shares)	1,083	1,159
Diluted (in shares)	1,102	1,170