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Derivatives And Hedging Activities (Changes In Accumulated Other Comprehensive Income Associated With Derivative Hedging Activities) (Details) (USD $)
In Millions
12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Derivatives And Hedging Activities      
Balance at beginning $ (2.4) $ (17.3) $ (11.4)
Current period changes in fair value, net of tax 8.5 11.6 (41.8)
Reclassification to earnings, net of tax (3.5) 3.3 35.9
Balance at ending $ 2.6 $ (2.4) $ (17.3)