COMMITMENTS AND CONTINGENCIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended					1 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2014 Guarantee agreement	Aug. 31, 2013 Guarantee agreement	Apr. 30, 2014 United States District Court	Sep. 18, 2008 United States District Court entities	Aug. 31, 2014 Federal court states	Aug. 31, 2014 CERCLA sites	Aug. 31, 2013 CERCLA sites
Loss Contingencies [Line Items]
Total rental expense	$ 46.8	$ 46.6	$ 43.9
Number of steel manufacturing companies							9
Litigation settlement amount						4.0
Number of states								28
Total environmental liabilities	6.2	9.0							0.7	0.9
Long-term environmental liabilities	2.3	5.0
Maximum credit facility				4.0
Maximum exposure				$ 0	$ 3.5