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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Annual minimum payments (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 1,942
Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 229
Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 205
Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 191
Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 145
2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 1,172
Ports [Member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 950
Ports [Member] | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 1 year
Discount rate 3.00%
Ports [Member] | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 20 years
Discount rate 5.00%
Ports [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 66
Ports [Member] | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 66
Ports [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 65
Ports [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 53
Ports [Member] | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 700
Ships [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 527
Ships [member] | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 2 years
Discount rate 3.00%
Ships [member] | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 10 years
Discount rate 4.00%
Ships [member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 62
Ships [member] | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 60
Ships [member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 59
Ships [member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 54
Ships [member] | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 292
Pellets plants  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 255
Pellets plants | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 1 year
Discount rate 2.00%
Pellets plants | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 10 years
Discount rate 5.00%
Pellets plants | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 53
Pellets plants | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 44
Pellets plants | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 42
Pellets plants | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 15
Pellets plants | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 101
Properties [Member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 121
Properties [Member] | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 1 year
Discount rate 2.00%
Properties [Member] | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 7 years
Discount rate 6.00%
Properties [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 36
Properties [Member] | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 25
Properties [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 15
Properties [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 14
Properties [Member] | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 31
Energy Plants [Member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 66
Energy Plants [Member] | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 1 year
Discount rate 5.00%
Energy Plants [Member] | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 7 years
Discount rate 6.00%
Energy Plants [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 6
Energy Plants [Member] | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 5
Energy Plants [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 5
Energy Plants [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 5
Energy Plants [Member] | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 45
Mining Equipment [Member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 23
Mining Equipment [Member] | Bottom of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 1 year
Discount rate 2.00%
Mining Equipment [Member] | Top of range [member]  
IfrsStatementLineItems [Line Items]  
Average Remaining Term 5 years
Discount rate 6.00%
Mining Equipment [Member] | Not later than one year [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 6
Mining Equipment [Member] | Later than one year and not later than two years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 5
Mining Equipment [Member] | Later than two years and not later than three years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 5
Mining Equipment [Member] | Later than three years and not later than four years [member]  
IfrsStatementLineItems [Line Items]  
Annual minimum payments 4
Mining Equipment [Member] | 2027 onwards  
IfrsStatementLineItems [Line Items]  
Annual minimum payments $ 3