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CONSOLIDATED FINANCIAL STATEMENT DETAILS - Inventories (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Inventories: |  |
Ore in stockpiles | $ 277.4 | $ 300.3
Ore on leach pads | 498.8 | 384.7
In-process | 108.0 | 99.2
Finished metal | 50.3 | 52.3
Materials and supplies | 448.2 | 520.6
Inventories, subtotal | 1,382.7 | 1,357.1
Long-term portion of ore in stockpiles and ore on leach pads | (309.8) | (303.3)
Total inventories | $ 1,072.9 | $ 1,053.8

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