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GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2017
Feb. 29, 2016
Aug. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]          
Gross carrying amounts of the intangible assets subject to amortization $ 19.8   $ 19.8   $ 18.6
Amortization expense for intangible assets $ 0.7 $ 1.0 $ 1.0 $ 2.1