SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - AVAILABLE FOR SALE SECURITIES (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Sep. 30, 2013
Accounting Policies [Abstract]
Available-for-sale securities, fair value disclosure	$ 12.1	[1]		$ 11.7
Available-for-sale securities, gross unrealized gain (loss)	9.5		9.1
Accumulated other comprehensive income, available-for-sale securities adjustment, net of tax	$ 5.6			$ 5.4

[1] Included in Other noncurrent assets on the Unaudited Condensed Consolidated Balance Sheets