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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Research and Development and Advertising Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Research and Development Costs      
Research and development expenses $ 91.8 $ 71.9 $ 70.2
Software development technology costs capitalized during the period 2.6 2.6 2.4
Advertising Costs      
Advertising costs $ 6.8 $ 7.3 $ 7.4