Annual and transition report of foreign private issuers [Sections 13 or 15(d)]

Reporting Entity (Details)

v3.25.1
Reporting Entity (Details)
€ in Thousands
12 Months Ended
Dec. 31, 2026
EUR (€)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
Dec. 27, 2024
EUR (€)
Jul. 31, 2024
shares
Jun. 16, 2024
$ / shares
Dec. 31, 2023
EUR (€)
Disclosure of detailed information about business combination [line items]              
Borrowings     € 512,014       € 350,722
Commencement of major litigation              
Disclosure of detailed information about business combination [line items]              
Anticipates receiving additional contractual capital commitments € 10,000 € 150,000          
Convertible instruments              
Disclosure of detailed information about business combination [line items]              
Borrowings     147,437 € 150,000     € 0
Allego N.V., | Madeleine              
Disclosure of detailed information about business combination [line items]              
Number of instruments or interests issues or issuable, per share (in USD per share) | $ / shares           $ 1.70  
Number of instruments or interests issued or issuable (in shares) | shares         38,718,988    
Funds available to acquiree, business combination     46,000        
Convertible bond funding liabilities incurred     € 310,000