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Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Research and Development (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Accounting Policies [Abstract]      
Research and development expense $ 43.3 $ 33.1 $ 32.9