Quarterly report pursuant to Section 13 or 15(d)

Goodwill And Other Intangible Assets (Narrative) (Details)

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Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Nov. 30, 2011
Nov. 30, 2010
Goodwill And Other Intangible Assets [Abstract]    
Amortization expense of intangible assets $ 7.2 $ 6.1
Future amortization expense, remainder of fiscal year 21.3  
Future amortization expense, 2013 26.9  
Future amortization expense, 2014 25.7  
Future amortization expense, 2015 25.5  
Future amortization expense, 2016 25.4  
Future amortization expense, thereafter $ 174.7