Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 566	$ 3,153	$ 2,775	$ 5,762
Intersegment revenue	0	0	0	0
Adjusted EBITDA	(436)	568	(512)	744
Depreciation	(191)	(176)	(376)	(352)
Amortization of intangible assets	(41)	(52)	(85)	(104)
Impairment of goodwill	(20)	0	(785)	0
Impairment of intangible assets	(10)	0	(131)	0
Stock-based compensation	(54)	(59)	(109)	(115)
Legal reserves, occupancy tax and other	(8)	(4)	13	(14)
Restructuring and related reorganization charges	(53)	(4)	(128)	(14)
Realized (gain) loss on revenue hedges	(36)	(8)	(30)	(11)
Operating income (loss)	(849)	265	(2,143)	134
Other expense, net	(104)	(30)	(289)	(40)
Income before income taxes	(953)	235	(2,432)	94
Provision for income taxes	213	(48)	295	(7)
Net income (loss)	(740)	187	(2,137)	87
Net (income) loss attributable to non-controlling interests	4	(4)	100	(7)
Net income (loss) attributable to Expedia Group, Inc.	(736)	183	(2,037)	80
Preferred stock dividend	(17)	0	(17)	0
Net income (loss) attributable to Expedia Group, Inc. common stockholders	(753)	183	(2,054)	80
Corporate & Eliminations
Segment Reporting Information [Line Items]
Revenue	17	(88)	5	(173)
Intersegment revenue	(3)	(88)	(54)	(173)
Adjusted EBITDA	(89)	(130)	(212)	(245)
Depreciation	(18)	(19)	(40)	(37)
Amortization of intangible assets	(41)	(52)	(85)	(104)
Impairment of goodwill	(20)		(785)
Impairment of intangible assets	(10)		(131)
Stock-based compensation	(54)	(59)	(109)	(115)
Legal reserves, occupancy tax and other	(8)	(4)	13	(14)
Restructuring and related reorganization charges	(53)	(4)	(128)	(14)
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income (loss)	(293)	(268)	(1,477)	(529)
Corporate & Eliminations | Bodybuilding.com
Segment Reporting Information [Line Items]
Revenue	20		59
Retail
Segment Reporting Information [Line Items]
Revenue	463	2,333	2,045	4,234
Retail | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	463	2,333	2,045	4,234
Intersegment revenue	0	0	0	0
Adjusted EBITDA	(203)	548	(181)	743
Depreciation	(136)	(127)	(264)	(255)
Amortization of intangible assets	0	0	0	0
Impairment of goodwill	0		0
Impairment of intangible assets	0		0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	(36)	(4)	(27)	(6)
Operating income (loss)	(375)	417	(472)	482
B2B
Segment Reporting Information [Line Items]
Revenue	68	657	553	1,213
B2B | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	68	657	553	1,213
Intersegment revenue	0	0	0	0
Adjusted EBITDA	(128)	130	(102)	202
Depreciation	(34)	(27)	(66)	(54)
Amortization of intangible assets	0	0	0	0
Impairment of goodwill	0		0
Impairment of intangible assets	0		0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	0	(4)	(3)	(5)
Operating income (loss)	(162)	99	(171)	143
trivago
Segment Reporting Information [Line Items]
Revenue	15	163	118	315
trivago | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	18	251	172	488
Intersegment revenue	3	88	54	173
Adjusted EBITDA	(16)	20	(17)	44
Depreciation	(3)	(3)	(6)	(6)
Amortization of intangible assets	0	0	0	0
Impairment of goodwill	0		0
Impairment of intangible assets	0		0
Stock-based compensation	0	0	0	0
Legal reserves, occupancy tax and other	0	0	0	0
Restructuring and related reorganization charges	0	0	0	0
Realized (gain) loss on revenue hedges	0	0	0	0
Operating income (loss)	$ (19)	$ 17	$ (23)	$ 38