INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	36.50%	36.60%	37.10%
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities		$ 2.4
Decrease in unrecognized tax benefits is reasonably possible	$ 3.9	$ 3.9