INVENTORIES (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
Oct. 05, 2015 |
Sep. 30, 2015 |
|---|---|---|---|---|
| Business Acquisition [Line Items] | ||||
| Supplies | $ 58.1 | $ 86.5 | $ 45.7 | |
| Raw materials | 79.1 | 91.5 | 67.9 | |
| Work in process | 114.7 | 105.8 | 29.0 | |
| Finished goods | 405.9 | 445.3 | 153.4 | |
| Inventory, gross | 657.8 | 729.1 | 296.0 | |
| LIFO reserve | (40.8) | (43.9) | (63.5) | |
| Inventories, net | $ 617.0 | $ 685.2 | $ 232.5 | |
| DCP Business | ||||
| Business Acquisition [Line Items] | ||||
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | $ 456.4 |