Basis of Presentation and Nature of Operations Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Revenue
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Out-of-period adjustment	$ 1.0	$ (0.4)
Gross Profit
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Out-of-period adjustment	1.8	(0.9)
Net Income
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Out-of-period adjustment	$ 2.8	$ 2.0