SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - AVAILABLE FOR SALE SECURITIES (Details) - USD ($) $ in Millions	Jun. 30, 2015		Sep. 30, 2014
Accounting Policies [Abstract]
Available-for-sale securities, fair value disclosure	$ 9.9	[1]	$ 10.7
Available-for-sale securities, gross unrealized gain (loss)	7.3		8.1
Accumulated other comprehensive income, available-for-sale securities adjustment, net of tax	$ 4.3		$ 4.8

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