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Information by business segment and geographic area (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Net operating revenue $ 41,784 $ 43,839 $ 54,502
Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 27,760 28,188 38,324
Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 5,803 6,256 7,053
Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 516 472 548
Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 5,193 6,619 5,376
Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2,376 1,779 2,590
Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 136 525 611
Country Of China [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 21,577 22,203 28,603
Country Of China [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 20,641 20,545 27,296
Country Of China [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2 41 159
Country Of China [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 7 55
Country Of China [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 642 1,538 904
Country Of China [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 292 72 189
Country Of China [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Country Of Japan [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 3,219 3,535 4,523
Country Of Japan [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2,356 2,557 3,489
Country Of Japan [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 279 208 488
Country Of Japan [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1
Country Of Japan [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 583 765 514
Country Of Japan [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 5 32
Country Of Japan [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Asia Except Japan And China [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 3,308 3,119 4,501
Asia Except Japan And China [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2,111 2,028 2,998
Asia Except Japan And China [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 407 393 515
Asia Except Japan And China [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 10 13 23
Asia Except Japan And China [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 513 484 592
Asia Except Japan And China [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 267 154 373
Asia Except Japan And China [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 47
Country Of Brazil [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 3,755 4,137 5,164
Country Of Brazil [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,370 1,305 1,778
Country Of Brazil [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,684 1,997 2,417
Country Of Brazil [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 502 447 425
Country Of Brazil [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 63 60 55
Country Of Brazil [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Country Of Brazil [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 136 328 489
Country Of United States Of America [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,623 1,643 1,543
Country Of United States Of America [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 23
Country Of United States Of America [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 262 218 369
Country Of United States Of America [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Country Of United States Of America [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,361 1,425 1,151
Country Of United States Of America [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Country Of United States Of America [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Americas Except United States And Brazil [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 897 1,199 1,283
Americas Except United States And Brazil [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1 5
Americas Except United States And Brazil [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 398 472 725
Americas Except United States And Brazil [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1 5 29
Americas Except United States And Brazil [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 456 597 362
Americas Except United States And Brazil [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 41 40
Americas Except United States And Brazil [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 125 122
Country Of Germany [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,351 1,521 2,034
Country Of Germany [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 244 357 558
Country Of Germany [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 55 16 48
Country Of Germany [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2 12
Country Of Germany [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 458 597 657
Country Of Germany [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 592 551 759
Country Of Germany [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Europe Except Germany [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 3,677 3,836 4,696
Europe Except Germany [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,037 1,396 2,175
Europe Except Germany [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 374 317 194
Europe Except Germany [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 4
Europe Except Germany [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,082 1,126 1,126
Europe Except Germany [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 1,184 997 1,197
Europe Except Germany [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Middle East Africa And Oceania [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2,377 2,646 2,155
Middle East Africa And Oceania [Member] | Iron Ore [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2
Middle East Africa And Oceania [Member] | Iron Ore Pellets [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 2,342 2,594 2,138
Middle East Africa And Oceania [Member] | Other Ferrous Products And Services [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Middle East Africa And Oceania [Member] | Nickel And Other Products [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 35 27 15
Middle East Africa And Oceania [Member] | Copper [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue
Middle East Africa And Oceania [Member] | Other [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue $ 25