Earnings (Loss) Per Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to Expedia Group, Inc.	$ (192)	$ 409	$ (2,229)	$ 489
Preferred stock dividend	(29)	0	(46)	0
Net income (loss) attributable to Expedia Group, Inc. common stockholders	$ (221)	$ 409	$ (2,275)	$ 489
Earnings (loss) per share attributable to Expedia Group, Inc. available to common stockholders:
Basic (in dollars per share)	$ (1.56)	$ 2.77	$ (16.13)	$ 3.30
Diluted (in dollars per share)	$ (1.56)	$ 2.71	$ (16.13)	$ 3.24
Weighted average number of shares outstanding (000's):
Basic (in shares)	141,306	147,232	141,068	148,052
Dilutive effect of:
Options to purchase common stock (in shares)	0	2,336	0	2,074
Other dilutive securities (in shares)	0	1,067	0	786
Diluted (in shares)	141,306	150,635	141,068	150,912