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Asset retirement obligations - Summary of present value of estimated future net cash outflows (Details)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Turkiye    
Disclosure of Asset Retirement Obligations [line items]    
Discount rate 3.90%  
Turkiye | Bottom of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.50% 2.30%
Discount rate   4.00%
Turkiye | Top of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 3.20% 3.10%
Discount rate   4.10%
Canada    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 3.20% 2.60%
Discount rate 3.90% 3.90%
Greece | Bottom of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.30% 2.40%
Discount rate 4.00% 4.10%
Greece | Top of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.50% 2.80%
Discount rate 4.20% 4.40%
Romania    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.50% 2.50%
Discount rate 4.20% 4.10%