INCOME TAX EXPENSE (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
INCOME TAX EXPENSE
Effective income tax rate	21.30%	21.50%	22.10%	22.30%
Decreasing the effective tax rate	0.90%	1.60%	0.40%	0.70%