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STOCK-BASED COMPENSATION PLANS (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 6.8 $ 6.1 $ 13.1 $ 11.8
Restricted stock units and performance stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted     1,600,000 1,000,000
Weighted average grant-date fair value     $ 15.83 $ 15.92
Liability awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares granted     464,782 392,517
Equivalent shares outstanding 917,968   917,968  
Equivalent shares expected to vest 873,789   873,789  
Fiscal 2016 | Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period in years     3 years  
Fiscal 2016 | Performance stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period in years     3 years  
Fiscal 2015 | Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period in years     3 years  
Fiscal 2015 | Certain restricted stock units | Vesting on second anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage     33.00%  
Fiscal 2015 | Certain restricted stock units | Vesting on third anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage     67.00%  
Fiscal 2015 | Performance stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period in years     3 years  
Fiscal 2014 | Certain restricted stock units | Vesting on second anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage     25.00%  
Fiscal 2014 | Certain restricted stock units | Vesting on third anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage     25.00%  
Fiscal 2014 | Certain restricted stock units | Vesting on fourth anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage     50.00%