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Goodwill and Intangible Assets, Net (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2023 and 2022:
 December 31,
 20232022
 (In millions)
Goodwill$6,849 $7,143 
Intangible assets with indefinite lives912 1,058 
Intangible assets with definite lives, net111 151 
$7,872 $8,352 
Schedule of Changes in Goodwill by Reportable Segment The following table presents the changes in goodwill by reportable segment:
B2CB2BtrivagoTotal
 (In millions)
Balance as of January 1, 2022$6,462 $394 $315 $7,171 
Foreign exchange translation and other(29)18 (17)(28)
Balance as of December 31, 20226,433 412 298 7,143 
Impairment charges— — (297)(297)
Foreign exchange translation and other3 1 (1)3 
Balance as of December 31, 2023$6,436 $413 $— $6,849 
Schedule of Intangible Assets with Definite Lives The following table presents the components of our intangible assets with definite lives as of December 31, 2023 and 2022:
 December 31, 2023December 31, 2022
 CostAccumulated
Amortization		NetCostAccumulated
Amortization		Net
 (In millions)
Customer relationships$382 $(353)$29 $382 $(336)$46 
Supplier relationships480 (471)9 478 (460)18 
Domain names167 (131)36 149 (118)31 
Other689 (652)37 686 (630)56 
Total$1,718 $(1,607)$111 $1,695 $(1,544)$151 
Schedule of Estimated Future Amortization Expense Related to Intangible Assets The estimated future amortization expense related to intangible assets with definite lives as of December 31, 2023, assuming no subsequent impairment of the underlying assets, is as follows, in millions:
2024$58 
202538 
202612 
20273 
Total$111