Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Cover Page

v3.22.1
Cover Page - shares
12 Months Ended
Dec. 31, 2021
May 10, 2022
Document Information [Line Items]    
Document Type 20-F  
Amendment Flag false  
Document Period End Date Dec. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus FY  
Entity Registrant Name Allego N.V.  
Entity Central Index Key 0001874474  
Current Fiscal Year End Date --12-31  
Document Annual Report true  
Document Transition Report false  
Document Shell Company Report false  
Document Registration Statement false  
Entity File Number 001-41329  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Document Accounting Standard International Financial Reporting Standards  
Entity Address, Address Line One Westervoortsedijk 73 KB  
Entity Address, City or Town Arnhem  
Entity Address, Country NL  
Entity Address, Postal Zip Code 6827  
Entity Incorporation, State or Country Code P7  
Entity Common Stock, Shares Outstanding   267,177,592
ICFR Auditor Attestation Flag false  
Auditor Name Ernst & Young Accountants LLP  
Auditor Firm ID 1396  
Auditor Location Amsterdam, Netherlands  
Business Contact [Member]    
Document Information [Line Items]    
Contact Personnel Name Mathieu Bonnet  
Entity Address, Address Line One Westervoortsedijk 73 KB  
Entity Address, City or Town Arnhem  
Entity Address, Country NL  
Entity Address, Postal Zip Code 6827  
City Area Code 31  
Local Phone Number 88 033 3033  
Ordinary Shares [member]    
Document Information [Line Items]    
Title of 12(b) Security Ordinary Shares  
Trading Symbol ALLG  
Security Exchange Name NYSE  
Warrants [member]    
Document Information [Line Items]    
Title of 12(b) Security Warrants  
Trading Symbol ALLG.WS  
Security Exchange Name NYSE