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Intangible Assets - Indefinite-Lived Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2013
Indefinite-lived Intangible Assets [Line Items]      
Gross Finite and Indefinite-Lived Intangible Assets $ 15.7   $ 20.1
Finite and Indefinited-Lived Accumulated Amortization and Impairment Charges (4.4)   (8.5)
Intangible Assets, Net (Excluding Goodwill) 11.3   11.6
Trade Names [Member]
     
Indefinite-lived Intangible Assets [Line Items]      
Indefinite-Lived Trade Names 1.1   1.1
Indefinite-lived Intangible Assets, Impairment Losses $ 0 $ 0