Segment Information - Schedule of Operating Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenue	$ 2,988	$ 2,889
Selling and marketing - direct	1,757	1,650
Adjusted EBITDA	296	255
Depreciation	(208)	(195)
Amortization of intangible assets	(11)	(15)
Stock-based compensation	(98)	(104)
Legal reserves, occupancy tax and other	0	(20)
Restructuring and related reorganization charges	(26)	(48)
Realized (gain) loss on revenue hedges	(23)	17
Operating income (loss)	(70)	(110)
Other expense, net	(147)	(45)
Loss before income taxes	(217)	(155)
Provision for income taxes	20	19
Net loss	(197)	(136)
Net (income) loss attributable to non-controlling interests	(3)	1
Net loss attributable to Expedia Group, Inc.	(200)	(135)
Corporate
Segment Reporting Information [Line Items]
Revenue	0	0
Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	(46)	(40)
Corporate & Eliminations
Segment Reporting Information [Line Items]
Revenue	(46)	(40)
Selling and marketing - direct	(46)	(40)
Other segment items	132	123
Adjusted EBITDA	(132)	(123)
Depreciation	(28)	(27)
Amortization of intangible assets	(11)	(15)
Stock-based compensation	(98)	(104)
Legal reserves, occupancy tax and other		(20)
Restructuring and related reorganization charges	(26)	(48)
Realized (gain) loss on revenue hedges	0	0
Operating income (loss)	(295)	(337)
B2C
Segment Reporting Information [Line Items]
Revenue	1,956	1,986
B2C | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	0	0
B2C | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	1,956	1,986
Cost of revenue	312	312
Selling and marketing - direct	1,115	1,096
Other segment items	312	363
Adjusted EBITDA	217	215
Depreciation	(135)	(133)
Amortization of intangible assets	0	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other		0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	(15)	13
Operating income (loss)	67	95
B2B
Segment Reporting Information [Line Items]
Revenue	947	833
B2B | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	0	0
B2B | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	947	833
Cost of revenue	38	39
Selling and marketing - direct	577	501
Other segment items	116	121
Adjusted EBITDA	216	172
Depreciation	(44)	(34)
Amortization of intangible assets	0	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other		0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	(8)	4
Operating income (loss)	164	142
trivago
Segment Reporting Information [Line Items]
Revenue	85	70
trivago | Intersegment revenue
Segment Reporting Information [Line Items]
Revenue	46	40
trivago | Reportable Segments
Segment Reporting Information [Line Items]
Revenue	131	110
Cost of revenue	4	4
Selling and marketing - direct	111	93
Other segment items	21	22
Adjusted EBITDA	(5)	(9)
Depreciation	(1)	(1)
Amortization of intangible assets	0	0
Stock-based compensation	0	0
Legal reserves, occupancy tax and other		0
Restructuring and related reorganization charges	0	0
Realized (gain) loss on revenue hedges	0	0
Operating income (loss)	$ (6)	$ (10)