|
Other Accrued Liabilities (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Other accrued liabilities | ||
| Compensation and other employee benefits | $ 13.1 | $ 22.1 |
| Construction in progress accruals | 9.4 | 2.8 |
| Accrued interest | 8.7 | 16.6 |
| Other accrued expense | 20.0 | 20.7 |
| Total other accrued liabilities | $ 51.2 | $ 62.2 |