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Property, plant and equipment - Right-of-use assets (Leases) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Ports [Member]  
IfrsStatementLineItems [Line Items]  
Beginning balance $ 680
Additions and contract modifications 23
Depreciation (54)
Translation adjustment 8
Ending balance 657
Ships [member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 492
Depreciation (44)
Translation adjustment 5
Ending balance 453
Pelletizing Plants [Member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 215
Additions and contract modifications 20
Depreciation (45)
Translation adjustment 14
Ending balance 204
Properties [Member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 84
Additions and contract modifications 22
Depreciation (28)
Translation adjustment 9
Ending balance 87
Energy Plants [Member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 49
Depreciation (7)
Translation adjustment (3)
Ending balance 39
Mning Equipment And Locomotives [Member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 17
Additions and contract modifications 12
Depreciation (7)
Translation adjustment (7)
Ending balance 15
Property, plant and equipment [member]  
IfrsStatementLineItems [Line Items]  
Beginning balance 1,537
Additions and contract modifications 77
Depreciation (185)
Translation adjustment 26
Ending balance $ 1,455