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Other liabilities (Narrative) (Details) - Product Loan [Member]
 12 Months Ended
Dec. 31, 2024
lb
kg
Dec. 31, 2023
lb
kg
Bottom of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Interest rate 0.50%  
Top of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Repayment date December 31, 2027  
Standby interest rate 1.50%  
Interest rate 3.00%  
UF6 [Member]    
Disclosure of detailed information about borrowings [line items]    
Product loans drawn | kg 1,567,000 1,777,000
UF6 [Member] | Top of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Available quantity | kg 1,768,000  
Uranium [Member]    
Disclosure of detailed information about borrowings [line items]    
Product loans drawn | lb 2,506,000 2,756,000
Uranium [Member] | Top of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Available quantity | lb 4,940,000