ORGANIZATION AND BASIS OF PRESENTATION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cost of providing promotional allowances	$ 20.0	$ 21.3	$ 59.5	$ 62.1
Senior Secured Credit Facility, Term Loan A and B
Debt Instrument [Line Items]
Principal reduction made by third-party	$ 18.9		$ 18.9		$ 18.6