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(Impairment), reversal of impairment and gain (losses) on disposal of non-current assets (Details 1)
t in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
t
Dec. 31, 2023
USD ($)
t
Nickel Operations [Member]    
IfrsStatementLineItems [Line Items]    
Carrying amount | $ $ 1,655 $ 1,789
Impairment testing results The recoverable amount of the operating segments is higher than the carrying amount, and therefore, there is no impairment to be recognized. The recoverable amount of the operating segments is higher than the carrying amount, and therefore, there is no impairment to be recognized.
Measurement of recoverable value FVLCD FVLCD
Sensitivity of key assumptions A 19.2% reduction in the long-term prices of all commodities or a 5.7% reduction in volumes would, alone, result in an estimated recoverable amount equal to the carrying value. A 14.2% reduction in the long-term prices of all commodities or a 4.3% reduction in volumes would, alone, result in an estimated recoverable amount equal to the carrying value.
Nickel Operations [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 5.00% 5.60%
Period of cash flow projections 2035 2034
Range of nickel forecasted prices 16,662 18,000
Nickel Operations [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 6.00% 5.90%
Period of cash flow projections 2049 2048
Range of nickel forecasted prices 21,000 23,000
Iron Ore Pellets [Member]    
IfrsStatementLineItems [Line Items]    
Carrying amount | $ $ 1,152 $ 1,473
Impairment testing results The recoverable amount of the operating segments is higher than the carrying amount, and therefore, there is no impairment to be recognized. The recoverable amount of the operating segments is higher than the carrying amount, and therefore, there is no impairment to be recognized.
Measurement of recoverable value FVLCD FVLCD
Discount rate 7.20% 7.00%
Period of cash flow projections 2054 2053
Sensitivity of key assumptions A 25% reduction in the long-term prices of all commodities or a 57% reduction in reserves would, alone, result in an estimated recoverable amount equal to the carrying value. A 34% reduction in the long-term prices of all commodities or a 61% reduction in reserves would, alone, result in an estimated recoverable amount equal to the carrying value.
Iron Ore Pellets [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Range iron ore forecasted prices 78 75
Iron Ore Pellets [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Range iron ore forecasted prices 95 98
Research And Development Project [Member]    
IfrsStatementLineItems [Line Items]    
Carrying amount | $ $ 445 $ 568
Impairment testing results The recoverable amount of the CGU is higher than the carrying amount, and therefore, there is no impairment to be recognised. The recoverable amount of the CGU is higher than the carrying amount, and therefore, there is no impairment to be recognised.
Measurement of recoverable value FVLCD FVLCD
Discount rate 7.20% 7.00%
Sensitivity of key assumptions A 12.3% reduction in the prices of all commodities or a 54.8% reduction in processing and beneficiating iron ore volumes would, alone, result in an estimated recoverable amount equal to the carrying value of this CGU. A 7,5% reduction in the prices of all commodities or a 67% reduction in processing and beneficiating iron ore volumes would, alone, result in an estimated recoverable amount equal to the carrying value of this CGU.
Beginning of operation and useful life 16 years of useful life 16 years of useful life
Research And Development Project [Member] | Bottom of range [member]    
IfrsStatementLineItems [Line Items]    
Range iron ore forecasted prices 78 80
Research And Development Project [Member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Range iron ore forecasted prices 95 98