Goodwill and Intangible Assets, Net - Schedule of Changes in Goodwill by Reportable Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 6,844	$ 6,849
Foreign exchange translation and other	12	(5)
Additions	16
Goodwill, ending balance	6,872	6,844
B2C
Goodwill [Roll Forward]
Goodwill, beginning balance	6,433	6,436
Foreign exchange translation and other	11	(3)
Additions	0
Goodwill, ending balance	6,444	6,433
B2B
Goodwill [Roll Forward]
Goodwill, beginning balance	411	413
Foreign exchange translation and other	1	(2)
Additions	0
Goodwill, ending balance	412	411
trivago
Goodwill [Roll Forward]
Goodwill, beginning balance	0	0
Foreign exchange translation and other	0	0
Additions	16
Goodwill, ending balance	$ 16	$ 0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

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