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Inventories (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Inventory Disclosure [Abstract] |  |  |
Finished goods | $ 280.1 | $ 402.9 |
Work in process | 6.5 | 6.0 |
Raw materials and repair parts | 207.8 | 198.8 |
Total | 494.4 | 607.7 |
Excess of current cost over last-in, first-out cost | (55.0) | (63.6) |
Total inventories, net | 439.4 | 544.1 |
Pre-tax income (loss) from LIFO inventory liquidations | 0.7 | 0.2 | $ 0.0
Reserve balance obsolete and slow moving inventories | $ 24.6 | $ 19.2 |

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