v3.26.1
Other liabilities (Narrative) (Details) - Product Loan [Member]
 12 Months Ended
Dec. 31, 2025
kg
lb
Dec. 31, 2024
kg
lb
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 March 31, 2032  
Standby interest rate 2.10%  
Interest rate 2.20%  
UF6 [Member]    
Disclosure of detailed information about borrowings [line items]    
Product loans drawn 1,285,000 1,567,000
Borrowing during period 345,000  
Repaid during period 627,000  
UF6 [Member] | Top of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Available quantity 2,270,000  
Uranium [Member]    
Disclosure of detailed information about borrowings [line items]    
Product loans drawn | lb 3,357,000 2,506,000
Borrowing during period 2,949,000  
Repaid during period 2,098,000  
Uranium [Member] | Top of range [Member]    
Disclosure of detailed information about borrowings [line items]    
Available quantity | lb 6,777,000