CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018		Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 2,880	$ 2,586		$ 5,388		$ 4,775
Costs and expenses:
Cost of revenue	498	439	[1]	985	[1]	861	[1]
Selling and marketing	1,541	1,443	[1]	3,057	[1]	2,713	[1]
Technology and content	400	343	[1]	796	[1]	665	[1]
General and administrative	196	179	[1]	395	[1]	337	[1]
Amortization of intangible assets	72	66		144		133
Impairment of goodwill	61	0		61		0
Legal reserves, occupancy tax and other	1	3		4		24
Restructuring and related reorganization charges	0	10		0		12
Operating income (loss)	111	103		(54)		30
Other income (expense):
Interest income	16	10		27		16
Interest expense	(51)	(43)		(102)		(86)
Other, net	(90)	(13)		(54)		(34)
Total other expense, net	(125)	(46)		(129)		(104)
Income (loss) before income taxes	(14)	57		(183)		(74)
Provision for income taxes	5	(3)		25		44
Net income (loss)	(9)	54		(158)		(30)
Net loss attributable to non-controlling interests	10	3		22		1
Net income (loss) attributable to Expedia Group, Inc.	$ 1	$ 57		$ (136)		$ (29)
Earnings (loss) per share attributable to Expedia Group, Inc. available to common stockholders:
Basic (in dollars per share)	$ 0.01	$ 0.37		$ (0.90)		$ (0.19)
Diluted (in dollars per share)	$ 0.01	$ 0.36		$ (0.90)		$ (0.19)
Shares used in computing earnings (loss) per share (000's):
Basic (in shares)	150,076	151,582		150,942		151,060
Diluted (in shares)	152,617	157,033		150,942		151,060
Dividends declared per common share (in dollars per share)	$ 0.3	$ 0.28		$ 0.6		$ 0.56

[1] Includes stock-based compensation as follows: Cost of revenue $3 million, $3 million, $5 million, and $6 million; Selling and marketing $12 million, $10 million, $23 million, and $21 million; Technology and content $16 million, $15 million, $31 million, and $28 million; General and administrative $19 million, $22 million, $41 million, and $42 million.