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CONSOLIDATED FINANCIAL STATEMENT DETAILS - Accounts receivable and other assets and Inventories (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2017
Accounts receivable and other assets: |  |
Trade receivables | $ 20.1 | $ 4.5
Prepaid expenses | 21.9 | 19.8
VAT receivable | 59.3 | 36.2
Deposits | 11.4 | 11.1
Other | 14.6 | 19.7
Total accounts receivable and other assets | 127.3 | 91.3
Inventories: |  |
Ore in stockpiles | 242.3 | 242.6
Ore on leach pads | 301.6 | 358.5
In-process | 78.6 | 122.3
Finished metal | 49.1 | 91.5
Materials and supplies | 534.1 | 519.3
Inventories, subtotal | 1,205.7 | 1,334.2
Long-term portion of ore in stockpiles and ore on leach pads | (218.9) | (239.9)
Inventories | 986.8 | $ 1,094.3
Inventory impairment charges | $ 71.3 |

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