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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2020
Inventory Disclosure [Abstract] |
Schedule of inventories | Inventories consist of the following:
| June 30, 2020 |  | December 31, 2019
Raw materials | $ | 71.2 |  |  | $ | 68.3 |
Work in process | 585.3 |  |  | 618.4 |
Finished goods | 1,157.2 |  |  | 1,219.3 |
Final price deferred(a) | 29.5 |  |  | 47.9 |
Operating materials and supplies | 110.8 |  |  | 122.5 |
| $ | 1,954.0 |  |  | $ | 2,076.4 |
______________________________ (a)Final price deferred is product that has shipped to customers, but the price has not yet been agreed upon

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