Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Intangible Assets

The following table presents our goodwill and intangible assets as of December 31, 2021 and 2020: 

	December 31,
	2021		2020
	(In millions)
Goodwill	$	7,171	$	7,380
Intangible assets with indefinite lives	1,166		1,183
Intangible assets with definite lives, net	227		332
	$	8,564	$	8,895

Changes in Goodwill by Reportable Segment

The following table presents the changes in goodwill by reportable segment:

	Retail		B2B		trivago		Total
	(In millions)
Balance as of January 1, 2020	$	7,049	$	529	$	549	$	8,127
Impairment charges	(559)		—		(240)		(799)
Foreign exchange translation and other	15		9		28		52
Balance as of December 31, 2020	6,505		538		337		7,380
Impairment charges	—		(14)		—		(14)
Additions	—		—		5		5
Deductions	(34)		(167)		—		(201)
Foreign exchange translation and other	(9)		37		(27)		1
Balance as of December 31, 2021	$	6,462	$	394	$	315	$	7,171

Components of Intangible Assets with Definite Lives

The following table presents the components of our intangible assets with definite lives as of December 31, 2021 and 2020:

	December 31, 2021						December 31, 2020
	Cost		Accumulated Amortization		Net		Cost		Accumulated Amortization		Net
	(In millions)
Customer relationships	$	565	$	(502)	$	63	$	638	$	(540)	$	98
Supplier relationships	626		(564)		62		661		(556)		105
Domain names	164		(133)		31		173		(133)		40
Other	1,016		(945)		71		1,075		(986)		89
Total	$	2,371	$	(2,144)	$	227	$	2,547	$	(2,215)	$	332

Estimated Future Amortization Expense Related to Intangible Assets

The estimated future amortization expense related to intangible assets with definite lives as of December 31, 2021, assuming no subsequent impairment of the underlying assets, is as follows, in millions:

2022	$	85
2023	53
2024	49
2025	33
2026	7
2027 and thereafter	—
Total	$	227