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Fair Value (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Jun. 30, 2012
Level 1 Inputs
   
Fair Value    
Cash equivalents $ 149.0 $ 144.0
Level 2 Inputs
   
Fair Value    
Secured borrowings fair value in excess of carrying value $ 0.1 $ 0.2