v3.26.1
Other liabilities (Standby product loan facilities with various counterparties) (Details) - Product Loan [Member]
Dec. 31, 2025
kg
lb
Dec. 31, 2024
kg
lb
UF6 conversion services [member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 1,285,000 1,567,000
UF6 conversion services [member] | 2026 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 940,000  
UF6 conversion services [member] | 2027 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 0  
UF6 conversion services [member] | 2028 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 0  
UF6 conversion services [member] | 2029 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 0  
UF6 conversion services [member] | 2030 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 0  
UF6 conversion services [member] | Thereafter [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn 345,000  
U3O8 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn | lb 3,357,000 2,506,000
U3O8 [Member] | 2026 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn | lb 408,000  
U3O8 [Member] | 2027 [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn | lb 2,048,000  
U3O8 [Member] | Thereafter [Member]    
Quantity of uranium drawn [Line Items]    
Product loans drawn | lb 901,000