SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, SALES TAX ACCOUNTING (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Accounting Policies [Abstract]
Sales tax	$ 47.4		$ 44.4		$ 32.3
TEFA	1.4	[1]	5.0	[1]	6.0	[1]
Total	$ 48.8		$ 49.4		$ 38.3

[1] TEFA was phased out in January 2014.