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Significant accounting policies - Summary of material subsidiaries (Details)
1 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Apr. 07, 2021
May 11, 2020
Deva Gold SA ("Deva")        
Disclosure of subsidiaries [line items]        
Ownership interest 80.50%      
Turkey | Tüprag Metal Madencilik Sanayi ve Ticaret AS ("Tüprag")        
Disclosure of subsidiaries [line items]        
Subsidiary   Tüprag Metal Madencilik Sanayi ve Ticaret AS ("Tüprag")    
Location   Turkey    
Ownership interest   100.00%    
Operations and development projects owned   Kişladağ MineEfemçukuru Mine    
Greece | Hellas Gold SA ("Hellas")        
Disclosure of subsidiaries [line items]        
Subsidiary   Hellas Gold SA ("Hellas") (1)    
Location   Greece    
Ownership interest   100.00%    
Operations and development projects owned   Olympias Mine Stratoni MineSkouries Project    
Percentage of voting equity interests acquired (as a percent)       5.00%
Greece | Thracean Gold Mining SA        
Disclosure of subsidiaries [line items]        
Subsidiary   Thracean Gold Mining SA    
Location   Greece    
Ownership interest   100.00%    
Operations and development projects owned   Perama Hill Project    
Greece | Thrace Minerals SA        
Disclosure of subsidiaries [line items]        
Subsidiary   Thrace Minerals SA    
Location   Greece    
Ownership interest   100.00%    
Operations and development projects owned   Sapes Project    
Canada | Eldorado Gold (Quebec) Inc.        
Disclosure of subsidiaries [line items]        
Subsidiary   Eldorado Gold (Québec) Inc. (2)    
Location   Canada    
Ownership interest   100.00%    
Operations and development projects owned   Lamaque Operations    
Percentage of voting equity interests acquired (as a percent)     100.00%  
Romania | Deva Gold SA ("Deva")        
Disclosure of subsidiaries [line items]        
Subsidiary   Deva Gold SA ("Deva")    
Location   Romania    
Ownership interest   80.50%    
Operations and development projects owned   Certej Project