| **Income Taxes - Table 1 (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended | 12 Months Ended |
|-------------------------------------------------------------------------------------|----------------|-----------------|
||
| **Current:**                                                                        |           |            |   |   |   |   |   |   |   |   |   |
| Federal                                                                             |           |            |   |   |   |   |   |   | $ 0.9 | $ 0.7 | $ 1.4 |
| State and local                                                                     |           |            |   |   |   |   |   |   | 5.4 | 5.2 | (0.8) |
| Total current expense                                                               |           |            |   |   |   |   |   |   | 6.3 | 5.9 | 0.6 |
| **Deferred:**                                                                       |           |            |   |   |   |   |   |   |   |   |   |
| Federal                                                                             |           |            |   |   |   |   |   |   | 11.3 | 104.2 | 48.2 |
| State and local                                                                     |           |            |   |   |   |   |   |   | (4.9) | (1.5) | (11.7) |
| Total deferred expense                                                              |           |            |   |   |   |   |   |   | 6.4 | 102.7 | 36.5 |
| Total income tax expense related to continuing operations                           | $ 30.5         | $ 35.2          | $ (86.5) | $ 33.5 | $ 24.5 | $ 28.1 | $ 26.9 | $ 29.1 | $ 12.7 | $ 108.6 | $ 37.1 |

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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.
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