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Intangible Assets (Projected Annual Amortization Expense for Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Sep. 30, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2015 $ 38.8  
2016 36.2  
2017 35.3  
2018 33.6  
2019 32.1  
Thereafter 365.2  
Total future amortization expense $ 541.2 $ 626.7