UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Total revenues	$ 2,640	$ 5,040	[1]	$ 5,558	$ 11,727	[1]
Operating expenses:
Marketing expenses	731	1,415		1,793	3,975
Sales and other expenses	129	276		637	739
Personnel, including stock-based compensation of $80, $79, $163 and $232, respectively	517	566		1,453	1,686
General and administrative	148	225		453	596
Information technology	71	71		219	206
Depreciation and amortization	115	117		344	352
Restructuring and other exit costs	41	0		75	0
Impairment of goodwill	573	0		1,062	0
Total operating expenses	2,325	2,670		6,036	7,554
Operating income (loss)	315	2,370		(478)	4,173
Other income (expense):
Interest income	5	44		49	113
Interest expense	(98)	(70)		(258)	(204)
Net gains (losses) on marketable equity securities	730	(49)		1,258	419
Impairment of investment	0	0		(100)	0
Foreign currency transactions and other	(117)	68		(149)	37
Total other income (expense)	520	(7)		800	365
Income before income taxes	835	2,363		322	4,538
Income tax expense	34	413		98	844
Net income	$ 801	$ 1,950		$ 224	$ 3,694
Net income applicable to common stockholders per basic common share (in dollars per share)	$ 19.56	$ 46.01		$ 5.46	$ 84.84
Weighted-average number of basic common shares outstanding (in shares)	40,935	42,389		40,983	43,540
Net income applicable to common stockholders per diluted common share (in dollars per share)	$ 19.49	$ 45.54		$ 5.44	$ 84.06
Weighted-average number of diluted common shares outstanding (in shares)	41,081	42,831		41,142	43,947
Agency revenues
Total revenues	$ 1,723	$ 3,435		$ 3,504	$ 7,991
Merchant revenues
Total revenues	837	1,313		1,741	2,875
Advertising and other revenues
Total revenues	$ 80	$ 292		$ 313	$ 861

[1] (1) Geographic information for the three and nine months ended September 30, 2019 has been recast to conform to the current period presentation