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(Impairment), reversal of impairment and gain (losses) on disposal of non-current assets (Details) - t
t in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Discount rate 7.30% 5.22%
Nickel Operations [Member]    
IfrsStatementLineItems [Line Items]    
Measurement of recoverable value FVLCD  
Nickel Operations [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 5.00%  
Period of cash flow projections 2035  
Range of nickel forecasted prices 16,662  
Nickel Operations [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 6.00%  
Period of cash flow projections 2049  
Range of nickel forecasted prices 21,000