Segment Information - Operating Segment Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 8,598,000,000	$ 5,199,000,000	$ 12,067,000,000
Adjusted EBITDA	1,477,000,000	(368,000,000)	2,134,000,000
Depreciation	(715,000,000)	(739,000,000)	(712,000,000)
Amortization of intangible assets	(99,000,000)	(154,000,000)	(198,000,000)
Impairment of goodwill	(14,000,000)	(799,000,000)	0
Intangible and other long-term asset impairment	6,000,000	175,000,000	0
Stock-based compensation	(418,000,000)	(205,000,000)	(241,000,000)
Legal reserves, occupancy tax and other	(1,000,000)	13,000,000	(34,000,000)
Restructuring and related reorganization charges	(55,000,000)	(231,000,000)	(24,000,000)
Realized (gain) loss on revenue hedges	17,000,000	(61,000,000)	(22,000,000)
Operating income (loss)	186,000,000	(2,719,000,000)	903,000,000
Other expense, net	(224,000,000)	(432,000,000)	(128,000,000)
Income (loss) before income taxes	(38,000,000)	(3,151,000,000)	775,000,000
Provision for income taxes	53,000,000	423,000,000	(203,000,000)
Net income (loss)	15,000,000	(2,728,000,000)	572,000,000
Net (income) loss attributable to non-controlling interests	(3,000,000)	116,000,000	(7,000,000)
Net income (loss) attributable to Expedia Group, Inc.	12,000,000	(2,612,000,000)	565,000,000
Preferred stock dividend	(67,000,000)	(75,000,000)	0
Loss on redemption of preferred stock	(214,000,000)	0	0
Net income (loss) attributable to Expedia Group, Inc. common stockholders	(269,000,000)	(2,687,000,000)	565,000,000
Corporate
Segment Reporting Information [Line Items]
Revenue	0	59,000,000	58,000,000
Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	(106,000,000)	(75,000,000)	(316,000,000)
Corporate & Eliminations
Segment Reporting Information [Line Items]
Revenue	(106,000,000)	(16,000,000)	(258,000,000)
Adjusted EBITDA	(454,000,000)	(462,000,000)	(592,000,000)
Depreciation	(81,000,000)	(74,000,000)	(79,000,000)
Amortization of intangible assets	(99,000,000)	(154,000,000)	(198,000,000)
Impairment of goodwill	(14,000,000)	(799,000,000)
Intangible and other long-term asset impairment	6,000,000	175,000,000
Stock-based compensation	(418,000,000)	(205,000,000)	(241,000,000)
Legal reserves, occupancy tax and other	(1,000,000)	13,000,000	(34,000,000)
Restructuring and related reorganization charges	(55,000,000)	(231,000,000)	(24,000,000)
Realized (gain) loss on revenue hedges	0	0	0
Operating income (loss)	(1,128,000,000)	(2,087,000,000)	(1,168,000,000)
Retail
Segment Reporting Information [Line Items]
Revenue	6,821,000,000	3,993,000,000	8,808,000,000
Impairment of goodwill	0	(559,000,000)
Retail | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	0	0	0
Retail | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	6,821,000,000	3,993,000,000	8,808,000,000
Adjusted EBITDA	1,782,000,000	298,000,000	2,171,000,000
Depreciation	(522,000,000)	(525,000,000)	(512,000,000)
Amortization of intangible assets	0	0	0
Impairment of goodwill	0	0
Intangible and other long-term asset impairment	0	0
Stock-based compensation	0	0	0
Legal reserves, occupancy tax and other	0	0	0
Restructuring and related reorganization charges	0	0	0
Realized (gain) loss on revenue hedges	17,000,000	(58,000,000)	(8,000,000)
Operating income (loss)	1,277,000,000	(285,000,000)	1,651,000,000
B2B
Segment Reporting Information [Line Items]
Revenue	1,460,000,000	942,000,000	2,579,000,000
Impairment of goodwill	(14,000,000)	0
B2B | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	0	0	0
B2B | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	1,460,000,000	942,000,000	2,579,000,000
Adjusted EBITDA	110,000,000	(190,000,000)	470,000,000
Depreciation	(102,000,000)	(128,000,000)	(110,000,000)
Amortization of intangible assets	0	0	0
Impairment of goodwill	0	0
Intangible and other long-term asset impairment	0	0
Stock-based compensation	0	0	0
Legal reserves, occupancy tax and other	0	0	0
Restructuring and related reorganization charges	0	0	0
Realized (gain) loss on revenue hedges	0	(3,000,000)	(14,000,000)
Operating income (loss)	8,000,000	(321,000,000)	346,000,000
trivago
Segment Reporting Information [Line Items]
Revenue	317,000,000	205,000,000	622,000,000
Impairment of goodwill	0	(240,000,000)
trivago | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	106,000,000	75,000,000	316,000,000
trivago | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	423,000,000	280,000,000	938,000,000
Adjusted EBITDA	39,000,000	(14,000,000)	85,000,000
Depreciation	(10,000,000)	(12,000,000)	(11,000,000)
Amortization of intangible assets	0	0	0
Impairment of goodwill	0	0
Intangible and other long-term asset impairment	0	0
Stock-based compensation	0	0	0
Legal reserves, occupancy tax and other	0	0	0
Restructuring and related reorganization charges	0	0	0
Realized (gain) loss on revenue hedges	0	0	0
Operating income (loss)	$ 29,000,000	$ (26,000,000)	$ 74,000,000