COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	May 31, 2015	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Loss Contingencies [Line Items]
Total rental expense		$ 40.7	$ 52.8	$ 46.8
Inventory items sold in th eoridinary course of business as a percentage of purchase obligations (percent)		68.00%
Benefit on contract termination	$ 45.5
Total environmental liabilities		$ 3.3	4.3
Long-term environmental liabilities		2.1	2.4
CERCLA sites
Loss Contingencies [Line Items]
Total environmental liabilities		$ 0.7	$ 1.0