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EMPLOYEES' RETIREMENT PLANS (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
United States
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Compensation expense under defined contribution profit sharing and savings plan and BRP Plan $ 19.3 $ 15.9 $ 13.0
BRP plan
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Deferred compensation liability 78.0 78.8  
Current value of segregated assets 69.5 59.4  
Net holding gain on segregated assets 13.3 9.9 5.3
Defined benefit plans
     
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Company expenses for defined benefit plans 2.0 3.6 2.2
Liability related to unfunded status of defined benefit plans $ 2.4 $ 3.5