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Investments in subsidiaries, associates and joint ventures - Guarantees provided (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |  |
% Voting capital | 29.60% |  |
Investments in associates and joint ventures | $ 1,798 | $ 1,751 |
Equity results in income statement | 246 | 494 |
Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | 1,296 | 1,113 |
Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | 1,296 | 1,113 |
Equity results in income statement | 213 | 166 | $ 50
Dividends received | 120 | 81 | 140
Base Metals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures |  | 17 |
Equity results in income statement | $ 3 | 1 |
Base Metals [Member] | Korea Nickel Corp [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 2500.00% |  |
% Voting capital | 2500.00% |  |
Investments in associates and joint ventures |  | 17 |
Equity results in income statement | $ 3 | 1 |
All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | 502 | 621 |
Equity results in income statement | 30 | 327 | (126)
Dividends received | $ 99 | 109 | 33
All other segments [member] | Mineracao Rio Grande do Norte S.A. |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 40.00% |  |
% Voting capital | 40.00% |  |
Baovale Mineracao S.A | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.00% |  |
% Voting capital | 50.00% |  |
Baovale Mineracao S.A | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 24 | 21 |
Equity results in income statement | $ 3 | 4 | 1
Dividends received |  | 1 |
Companhia Coreano Brasileira De Pelotizacao [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.00% |  |
% Voting capital | 50.00% |  |
Companhia Coreano Brasileira De Pelotizacao [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 80 | 51 |
Equity results in income statement | 37 | 46 | 8
Dividends received | $ 17 | 33 | 34
Companhia Hispano Brasileira De Pelotizacao [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.89% |  |
% Voting capital | 50.00% |  |
Companhia Hispano Brasileira De Pelotizacao [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 48 | 38 |
Equity results in income statement | 18 | 1 | 11
Dividends received | $ 6 | 7 | 27
Companhia Italo Brasileira De Pelotizacao [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.90% |  |
% Voting capital | 50.00% |  |
Companhia Italo Brasileira De Pelotizacao [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 62 | 48 |
Equity results in income statement | 31 | 40 | 10
Dividends received | $ 24 | 23 | 23
Companhia Nipo Brasileira De Pelotizacao [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 51.00% |  |
% Voting capital | 50.00% |  |
Companhia Nipo Brasileira De Pelotizacao [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 145 | 129 |
Equity results in income statement | 52 | 40 | 8
Dividends received | $ 59 | 8 | 32
Mrs Logistica S.a. [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 48.16% |  |
% Voting capital | 47.09% |  |
Mrs Logistica S.a. [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 509 | 418 |
Equity results in income statement | 81 | 75 | 34
Dividends received | $ 14 | 9 | 22
Samarco Mineracao S.a. [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.00% |  |
% Voting capital | 50.00% |  |
Vli S.a. [Member] | Iron Solutions [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 29.60% |  |
% Voting capital | 29.60% |  |
Vli S.a. [Member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 428 | 408 |
Equity results in income statement | $ (9) | (40) | (22)
Dividends received |  |  | 2
Alianca Geracao de Energia S.A. | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 55.00% |  |
% Voting capital | 55.00% |  |
Investments in associates and joint ventures | $ 340 | 367 |
Equity results in income statement | 31 | 53 | 28
Dividends received | $ 34 | 25 | 24
Alianca Norte Energia Participacoes S.A. | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 51.00% |  |
% Voting capital | 51.00% |  |
Investments in associates and joint ventures | $ 106 | 105 |
Equity results in income statement | $ (7) | (4) |
All other segments [member] | Ferrous Minerals [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity results in income statement |  |  | (8)
California Steel Industries, Inc | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.00% |  |
% Voting capital | 50.00% |  |
Equity results in income statement |  | 228 | (7)
Dividends received | $ 65 | 84 |
Companhia Siderurgica Do Pecem [Member] | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Ownership interest in joint venture (as a percent) | 50.00% |  |
% Voting capital | 50.00% |  |
Investments in associates and joint ventures |  | 99 |
Equity results in income statement |  | 56 | (131)
Mineracao Rio Grande do Norte S.A. | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity results in income statement |  | (5) | (3)
Dividends received |  |  | 9
Other [Member] | All other segments [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | $ 56 | 50 |
Equity results in income statement | 6 | (1) | (5)
Equity Results In Associates And Joint Ventures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | 1,798 | 1,751 |
Equity results in income statement | 246 | 494 | (76)
Dividends received | 219 | 190 | 173
Other Results In Associates And Joint Ventures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Equity results in income statement | 59 | (1,765) | (944)
Equity Results And Other Results In Associates And Joint Ventures [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Investments in associates and joint ventures | 1,798 | 1,751 |
Equity results in income statement | 305 | (1,271) | (1,020)
Dividends received | $ 219 | $ 190 | $ 173

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