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EMPLOYEES' RETIREMENT PLANS (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
BRP plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Deferred compensation liability $ 72.3 $ 78.0  
Current value of segregated assets 66.6 69.5  
Net holding gain on segregated assets   13.3 $ 9.9
Defined benefit plans      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Company expenses for defined benefit plans 0.7 2.0 3.6
Liability related to unfunded status of defined benefit plans 1.5 2.4  
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 $ 9.7 $ 19.3 $ 15.9