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Income Taxes Income Taxes (Taxes by Jurisdiction) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2015
Current Income Tax Expense (Benefit)   $ (1.0) $ (0.3)
Deferred income taxes $ (2.4)    
Provision (benefit) for income taxes (2.4) (1.0) (0.3)
Domestic Tax Authority [Member]      
Deferred income taxes $ (2.4)    
State and Local Jurisdiction [Member]      
Current Income Tax Expense (Benefit)   $ (1.0) $ (0.3)