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Income Taxes Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Operating Loss Carryforwards [Line Items]        
Effective Income Tax Rate Reconciliation, Percent 94.40% (32.00%) 93.80% (40.40%)
Discontinued Operations [Member]        
Operating Loss Carryforwards [Line Items]        
Operating Loss Carryforwards   $ 5.9   $ 5.9