|
Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
|---|---|---|---|
| Long-term Debt Types [Abstract] | |||
| Captial lease arrangments | $ 11.6 | $ 54.7 | |
| Long Term Debt By Current And Noncurrent [Abstract] | |||
| Current maturities of long-term debt | 29.4 | 28.7 | |
| Long-term debt | $ 363.2 | $ 335.3 |