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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Discount rates (Details)
Dec. 31, 2021
Ports | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 3.00%
Ports | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 6.00%
Vessels | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 3.00%
Vessels | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 4.00%
Pellets plants | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 3.00%
Pellets plants | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 5.00%
Properties | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 3.00%
Properties | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 7.00%
Energy plants | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 4.00%
Energy plants | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 5.00%
Mining equipment and locomotives | Minimum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 3.00%
Mining equipment and locomotives | Maximum  
Disclosure of detailed information about borrowings [line items]  
Discount rates applied in discounting the lease liabilities at present value 7.00%