|
Inventories (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Raw materials | $ 80.5 | $ 114.6 |
| Work in process | 466.8 | 505.1 |
| Finished goods | 908.1 | 1,025.5 |
| Operating materials and supplies | 67.6 | 73.1 |
| Total Inventory | $ 1,523.0 | $ 1,718.3 |