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Information by business segment and by geographic area - Assets (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Investments in associates and joint ventures | $ 1,798 | $ 1,751
Property, plant and equipment and intangibles | 55,176 | 50,942
Sustaining capital (i) | 3,859 | 4,034
Project execution | 1,587 | 999
Product inventory | 5,446 | 5,033
Iron Solutions [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Investments in associates and joint ventures | 1,296 | 1,113
Property, plant and equipment and intangibles | 33,048 | 28,988
Sustaining capital (i) | 2,236 | 2,481
Project execution | 866 | 531
Product inventory | 3,102 | 3,012
Energy Transition Materials [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Investments in associates and joint ventures |  | 17
Property, plant and equipment and intangibles | 19,655 | 20,127
Sustaining capital (i) | 1,521 | 1,518
Project execution | 338 | 344
Product inventory | 1,859 | 1,862
All other segments [member] |  |
IfrsStatementLineItems [Line Items] |  |
Investments in associates and joint ventures | 502 | 621
Property, plant and equipment and intangibles | 2,473 | 1,827
Sustaining capital (i) | 102 | 35
Project execution | 383 | 124
Product inventory | $ 485 | $ 159

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