CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net revenues	$ 2,606	$ 2,083	$ 7,403	$ 6,400
Cost of net revenues	656	530	1,731	1,580
Gross profit	1,950	1,553	5,672	4,820
Operating expenses:
Sales and marketing	660	577	1,835	1,731
Product development	287	243	788	735
General and administrative	258	250	750	756
Provision for transaction losses	60	68	245	194
Amortization of acquired intangible assets	6	7	20	21
Total operating expenses	1,271	1,145	3,638	3,437
Income from operations	679	408	2,034	1,383
Interest and other, net	95	(142)	277	(128)
Income from continuing operations before income taxes	774	266	2,311	1,255
Income tax provision	(153)	(56)	(550)	(208)
Income from continuing operations	621	210	1,761	1,047
Income from discontinued operations, net of income taxes	43	100	3,061	183
Net income	$ 664	$ 310	$ 4,822	$ 1,230
Income per share - basic:
Continuing operations (in usd per share)	$ 0.89	$ 0.25	$ 2.46	$ 1.21
Discontinued operations (in usd per share)	0.06	0.12	4.26	0.22
Net income per share - basic (in usd per share)	0.95	0.37	6.72	1.43
Income per share - diluted:
Continuing operations (in usd per share)	0.88	0.25	2.43	1.20
Discontinued operations (in usd per share)	0.06	0.12	4.22	0.22
Net income per share - diluted (in usd per share)	$ 0.94	$ 0.37	$ 6.65	$ 1.42
Weighted-average shares:
Basic (in shares)	696	830	717	863
Diluted (in shares)	708	837	725	870