CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Total revenues	$ 15,066	$ 14,527	$ 12,681
Cost of revenues			242
Gross profit			12,439
Operating expenses:
Performance marketing	4,419	4,447	4,161
Brand marketing	548	509	435
Sales and other expenses	955	830	517
Personnel, including stock-based compensation of $308, $317 and $261, respectively	2,248	2,042	1,660
General and administrative	797	699	576
Information technology	285	233	189
Depreciation and amortization	469	426	363
Total operating expenses	9,721	9,186	7,901
Operating income	5,345	5,341	4,538
Other income (expense):
Interest income	152	187	157
Interest expense	(266)	(269)	(254)
Net unrealized gains (losses) on marketable equity securities	745	(367)	0
Foreign currency transactions and other	(18)	(57)	(42)
Total other income (expense)	613	(506)	(139)
Earnings before income taxes	5,958	4,835	4,399
Income tax expense	1,093	837	2,058
Net income	$ 4,865	$ 3,998	$ 2,341
Net income applicable to common stockholders per basic common share	$ 112.93	$ 84.26	$ 47.78
Weighted-average number of basic common shares outstanding (in 000's)	43,082	47,446	48,994
Net income applicable to common stockholders per diluted common share	$ 111.82	$ 83.26	$ 46.86
Weighted-average number of diluted common shares outstanding (in 000's)	43,509	48,017	49,954
Agency Revenue
Total revenues	$ 10,117	$ 10,480	$ 9,714
Merchant Revenue
Total revenues	3,830	2,987	2,133
Advertising and other revenues
Total revenues	$ 1,119	$ 1,060	$ 834