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Asset retirement obligations - Summary of present value of estimated future net cash outflows (Details)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Turkiye    
Disclosure of Asset Retirement Obligations [line items]    
Discount rate 4.60% 3.90%
Turkiye | Bottom of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.60% 2.50%
Turkiye | Top of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.90% 3.20%
Canada    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.50% 3.20%
Discount rate 4.90% 3.90%
Greece | Bottom of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.50% 2.30%
Discount rate 4.40% 4.00%
Greece | Top of range    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 4.20% 2.50%
Discount rate 4.90% 4.20%
Other Jurisdictions    
Disclosure of Asset Retirement Obligations [line items]    
Inflation rate 2.40% 2.50%
Discount rate 4.90% 4.20%