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

Group information - Summary of Subsidiaries (Detail)

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Group information - Summary of Subsidiaries (Detail)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allego B.V. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego B.V.    
Place of business/country of incorporation Arnhem, the Netherlands    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Innovations B.V. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Innovations B.V.    
Place of business/country of incorporation Arnhem, the Netherlands    
Principle activities Software development    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Employment B.V. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Employment B.V.    
Place of business/country of incorporation Arnhem, the Netherlands    
Principle activities Staffing agency within the Group    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego GmbH [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego GmbH    
Place of business/country of incorporation Berlin, Germany    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Belgi B.V. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego België B.V.    
Place of business/country of incorporation Mechelen, Belgium    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego France SAS [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego France SAS    
Place of business/country of incorporation Paris, France    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Charging Ltd [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Charging Ltd    
Place of business/country of incorporation London, United Kingdom    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Denmark ApS [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Denmark ApS    
Place of business/country of incorporation Copenhagen, Denmark    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego, Unipessoal Lda [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego, Unipessoal Lda    
Place of business/country of incorporation Lisbon, Portugal    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Norway AS [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Norway AS    
Place of business/country of incorporation Olso, Norway    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Sweden AB [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Sweden AB    
Place of business/country of incorporation Stockholm, Sweden    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 100.00% 100.00%
Allego Italy S.R.L. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Italy S.R.L.    
Place of business/country of incorporation Torino, Italy    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 0.00% 0.00%
Allego Spain S.L.U. [Member]      
Disclosure of subsidiaries [line items]      
Name of entity Allego Spain S.L.U.    
Place of business/country of incorporation Madrid, Spain    
Principle activities Charging solutions for electric vehicles    
Ownership interest held by the Group 100.00% 0.00% 0.00%