UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total revenues	$ 1,141	$ 2,288
Operating expenses:
Marketing expenses	461	851
Sales and other expenses	112	377
Personnel, including stock-based compensation of $109 and $6, respectively	552	484
General and administrative	119	201
Information technology	87	78
Depreciation and amortization	113	117
Restructuring and other exit costs	8	0
Impairment of goodwill	0	489
Total operating expenses	1,452	2,597
Operating loss	(311)	(309)
Interest expense	(98)	(64)
Other income (expense), net	131	(349)
Loss before income taxes	(278)	(722)
Income tax benefit	(223)	(23)
Net loss	$ (55)	$ (699)
Net loss applicable to common stockholders per basic common share (in dollars per share)	$ (1.34)	$ (17.01)
Weighted-average number of basic common shares outstanding (in shares)	40,973	41,093
Net loss applicable to common stockholders per diluted common share (in dollars per share)	$ (1.34)	$ (17.01)
Weighted-average number of diluted common shares outstanding (in shares)	40,973	41,093
Agency revenues
Total revenues	$ 717	$ 1,424
Merchant revenues
Total revenues	373	659
Advertising and other revenues
Total revenues	$ 51	$ 205