|
Fair Value (Carrying Amount And Estimated Fair Values Of Financial Instruments) (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Debt Instrument [Line Items] | ||
| Current portion of long-term debt | $ 0 | |
| Current Portion of Long Term Debt, Fair Value | 0 | |
| Long-term debt, Carrying Amount | 630.9 | |
| Long-term debt, Estimated Fair Value | 630.9 | |
| Predecessor [Member] | ||
| Debt Instrument [Line Items] | ||
| Current portion of long-term debt | 115.9 | |
| Current Portion of Long Term Debt, Fair Value | 120.0 | |
| Long-term debt, Carrying Amount | 1,472.8 | |
| Long-term debt, Estimated Fair Value | $ 1,550.4 |