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Derivatives And Hedging Activities (Tables)
3 Months Ended
Sep. 30, 2011
Derivatives And Hedging Activities [Abstract] 
Fair Value Of Outstanding Derivative Contracts Recorded In Balance Sheets
Summary Of The Gains (Losses) Related To Cash Flow Hedges
Changes In Accumulated Other Comprehensive Income Associated With Derivative Hedging Activities
                 
     September 30,  
($ in millions)     2011     2010  

Balance at July 1

   $ 2.6      $ (2.4

Current period changes in fair value, net of tax

     (33.2     6.0   

Reclassification to earnings, net of tax

     0.7        0.6   
    

 

 

   

 

 

 

Balance at September 30

   $ (29.9   $ 4.2