CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Net revenues	$ 2,865	$ 2,423	$ 5,239	$ 4,836
Cost of net revenues	598	553	1,124	1,092
Gross profit	2,267	1,870	4,115	3,744
Operating expenses:
Sales and marketing	716	688	1,323	1,335
Product development	308	295	575	567
General and administrative	320	256	554	540
Provision for transaction losses	93	63	195	130
Amortization of acquired intangible assets	9	10	18	21
Total operating expenses	1,446	1,312	2,665	2,593
Income from operations	821	558	1,450	1,151
Interest and other, net	182	(51)	184	13
Income from continuing operations before income taxes	1,003	507	1,634	1,164
Income tax provision	(263)	(107)	(409)	(248)
Income from continuing operations	740	400	1,225	916
Income from discontinued operations, net of income taxes	6	2	2,933	4
Net income	$ 746	$ 402	$ 4,158	$ 920
Income per share - basic:
Continuing operations (in usd per share)	$ 1.05	$ 0.47	$ 1.68	$ 1.04
Discontinued operations (in usd per share)	0.01	0	4.03	0.01
Net income per share - basic (in usd per share)	1.06	0.47	5.71	1.05
Income per share - diluted:
Continuing operations (in usd per share)	1.04	0.46	1.67	1.03
Discontinued operations (in usd per share)	0.01	0	4.00	0.01
Net income per share - diluted (in usd per share)	$ 1.05	$ 0.46	$ 5.67	$ 1.04
Weighted-average shares:
Basic (in shares)	703	860	728	880
Diluted (in shares)	711	867	734	887