INCOME TAX EXPENSE (Narrative) (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Expense [Line Items]
Decrease in effective tax rate	5.10%		1.80%
Increase in effective tax rate				1.70%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent		1.80%		1.80%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent				1.50%
Effective Income Tax Rate Reconciliation, Percent	27.40%	34.20%	31.40%	34.30%
Effective Income Tax Rate, Return to Provision True-ups, Increase		1.30%		0.50%