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Brumadinho dam failure - Operation Stoppages (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
De-characterization of upstream structures |  |  |  |
Contingencies |  |  |  |
Loss related to operational stoppage and idle capacity | $ 80 | $ 104 | $ 193 | $ 267

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