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Fair Value Measurements (Details 2) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Jun. 30, 2011
Carrying Value
   
Carrying amounts and estimated fair values of financial instruments not recorded at fair value    
Long-term debt, including current portion $ 406.9 $ 507.8
Company-owned life insurance 11.0 11.4
Fair Value
   
Carrying amounts and estimated fair values of financial instruments not recorded at fair value    
Long-term debt, including current portion 427.7 515.9
Company-owned life insurance $ 11.0 $ 11.4