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STOCK-BASED COMPENSATION PLANS (Narrative) (Details)
$ in Millions
12 Months Ended
Aug. 31, 2016
USD ($)
Interval
shares
Aug. 31, 2015
USD ($)
shares
Aug. 31, 2014
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense | $ $ 26.4 $ 23.5 $ 18.1
Total unrecognized compensation cost | $ $ 22.4    
Period of unrecognized compensation to be recognized 3 years    
Shares available for future grants 9,394,846    
Fair value of shares vested | $ $ 21.3 $ 10.2 $ 10.0
Certain RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period of unrecognized compensation to be recognized 4 years    
Restricted stock units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards and performance stock units, granted, shares 1,137,000 987,574 1,191,544
Restricted stock units | United States      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting frequency | Interval 3    
Vesting period 3 years    
Restricted stock units | Non-U.S.      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting frequency | Interval 3    
Vesting period 3 years    
Performance Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards and performance stock units, granted, shares 540,295 462,496 450,233
Performance Awards | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Payout percentage 50.00%    
Performance Awards | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Payout percentage 200.00%    
Performance Awards | EBITDA      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage that performance targets are weighted 75.00% 75.00% 75.00%
Performance Awards | Relative total stockholder return      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage that performance targets are weighted 25.00% 25.00% 25.00%
Liability awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards and performance stock units, granted, shares 464,782 392,517  
Equivalent number of awards outstanding 871,182    
Equivalent number of shares expected to vest 829,343    
Stock appreciation rights and stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock appreciation rights and stock options, granted, number 0 0 0
Equivalent shares of SARs outstanding 358,994    
Cash-settled stock appreciation rights      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock appreciation rights and stock options, granted, number 0 0 59,399
Equivalent shares of SARs outstanding 38,446    
Equivalent number of shares expected to vest 36,524    
Vesting in two years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 25.00%    
Vesting period 2 years    
Vesting in three years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 25.00%    
Vesting period 3 years    
Vesting in four years      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 50.00%    
Vesting period 4 years    
Employee stock purchase plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants 3,646,714    
Maximum number of shares per employee 400    
Purchase discount from market price 15.00% 15.00% 15.00%