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Summary of Significant Accounting Policies (Schedule of Product Warranty Liability) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]      
Balance at beginning of year $ 2.8 $ 1.6 $ 2.0
Warranty expense 4.1 4.2 1.4
Warranty payments (4.3) (3.0) (1.8)
Balance at end of year $ 2.6 $ 2.8 $ 1.6