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Contingencies (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
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Applicability, Impact and Conclusion of Environmental Loss Contingencies [Abstract] |  |
Environmental contingency accrual | $ 174.4 | $ 185.5
New Wales Phase II East Stack |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 53.9 |
Brazilian subsidiary judicial and administrative proceedings |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 74.5 |
Brazilian subsidiary labor claims |  |
Loss Contingencies [Line Items] |  |
Loss Contingency Accrual | 63.3 |
Maximum | Brazilian subsidiary judicial and administrative proceedings |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 868.4 |
Maximum | Brazilian Non Income Tax Proceedings |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 586.5 |
Maximum | Brazilian Non Income Tax Proceedings | Indemnification Agreement Vale S.A. |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 220.2 |
Maximum | Brazilian Non Income Tax Proceedings | PIS And Cofins Cases |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | 382.4 |
Maximum | Brazilian subsidiary labor claims |  |
Loss Contingencies [Line Items] |  |
Maximum potential liabilitiy | $ 673.9 |

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