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STOCK-BASED COMPENSATION PLANS (Restricted Stock Awards and Performance Stock Units Excluding the Cash Component) (Details) - Restricted stock units and performance stock units excluding the cash component - $ / shares
12 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding number, beginning balance 2,733,334 2,080,580 1,907,418
Granted, number 1,612,772 1,468,696 1,275,355
Vested, number (1,471,436) (712,279) (737,870)
Forfeited, number (174,440) (103,663) (364,323)
Outstanding number, ending balance 2,700,230 2,733,334 2,080,580
Outstanding, weighted average grant-date fair value, beginning balance $ 15.86 $ 15.37 $ 13.57
Granted, weighted average grant-date fair value 15.83 15.79 16.89
Vested, weighted average grant-date fair value 14.47 14.33 13.55
Forfeited, weighted average grant-date fair value 17.60 15.51 14.94
Outstanding, weighted average grant-date fair value, ending balance $ 16.49 $ 15.86 $ 15.37