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Cover
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Document Period End Date Dec. 31, 2025
Current Fiscal Year End Date --12-31
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-37959
Entity Registrant Name trivago N.V.
Entity Incorporation, State or Country Code P7
Entity Address, Address Line One Kesselstraße 5 - 7
Entity Address, Postal Zip Code 40221
Entity Address, City or Town Düsseldorf
Entity Address, Country DE
Title of 12(b) Security American Depositary Shares, each representing five Class A shares, nominal value €0.06 per share
Trading Symbol TRVG
Security Exchange Name NASDAQ
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Entity Central Index Key 0001683825
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Amendment Flag false
Class A common stock  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 115,621,475
Class B common stock  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 237,476,895
Business contact  
Document Information [Line Items]  
Entity Address, Address Line One Kesselstraße 5 - 7
Entity Address, Postal Zip Code 40221
Entity Address, City or Town Düsseldorf
Entity Address, Country DE
Contact Personnel Name Johannes Thomas
Country Region +49
City Area Code 211
Local Phone Number 3876840000