Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 2,209	$ 2,609
Intersegment revenue	0	0
Adjusted EBITDA	(76)	176
Depreciation	(185)	(176)
Amortization of intangible assets	(44)	(52)
Impairment of goodwill	(765)	0
Impairment of intangible assets	(121)	0
Stock-based compensation	(55)	(56)
Legal reserves, occupancy tax and other	21	(10)
Restructuring and related reorganization charges	(75)	(10)
Realized (gain) loss on revenue hedges	6	(3)
Operating income (loss)	(1,294)	(131)
Other expense, net	(185)	(10)
Income before income taxes	(1,479)	(141)
Provision for income taxes	82	41
Net loss	(1,397)	(100)
Net (income) loss attributable to non-controlling interests	96	(3)
Net income attributable to Expedia Group, Inc.	(1,301)	(103)
Corporate & Eliminations
Segment Reporting Information [Line Items]
Revenue	(12)	(85)
Intersegment revenue	(51)	(85)
Adjusted EBITDA	(123)	(115)
Depreciation	(22)	(18)
Amortization of intangible assets	(44)	(52)
Impairment of goodwill	(765)
Impairment of intangible assets	(121)
Stock-based compensation	(55)	(56)
Legal reserves, occupancy tax and other	21	(10)
Restructuring and related reorganization charges	(75)	(10)
Realized (gain) loss on revenue hedges	0	0
Operating income (loss)	(1,184)	(261)
Corporate & Eliminations | Bodybuilding.com
Segment Reporting Information [Line Items]
Revenue	39
Retail
Segment Reporting Information [Line Items]
Revenue	1,582	1,901
Retail | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	1,582	1,901
Intersegment revenue	0
Adjusted EBITDA	22	195
Depreciation	(128)	(128)
Amortization of intangible assets	0	0
Impairment of goodwill	0
Impairment of intangible assets	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other	0	0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	9	(2)
Operating income (loss)	(97)	65
B2B
Segment Reporting Information [Line Items]
Revenue	485	556
B2B | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	485	556
Intersegment revenue	0	0
Adjusted EBITDA	26	72
Depreciation	(32)	(27)
Amortization of intangible assets	0	0
Impairment of goodwill	0
Impairment of intangible assets	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other	0	0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	(3)	(1)
Operating income (loss)	(9)	44
trivago
Segment Reporting Information [Line Items]
Revenue	103	152
trivago | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	154	237
Intersegment revenue	51	85
Adjusted EBITDA	(1)	24
Depreciation	(3)	(3)
Amortization of intangible assets	0	0
Impairment of goodwill	0
Impairment of intangible assets	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other	0	0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	0	0
Operating income (loss)	$ (4)	$ 21