INCOME TAXES, Effective Income Tax Reconciliation (Details)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Effective income tax rate reconciliation (as a percent):
Provision calculated at statutory rate	21.00%	21.00%	21.00%
State income tax, net of federal benefit	3.60%	3.60%	3.70%
(Gains)/losses on company-owned life insurance policies which are not subject to tax	1.80%	(1.80%)	(1.00%)
Nondeductible compensation	0.40%	0.30%	0.40%
Change in uncertain tax positions	0.30%	(0.10%)	0.20%
Foreign tax rate differential	0.20%	0.20%	0.20%
Tax credits	(1.20%)	(1.00%)	(1.60%)
Excess tax benefits related to share-based compensation	(1.10%)	(0.20%)	(0.60%)
Other, net	0.40%	(0.30%)	(0.10%)
Total provision for income tax	25.40%	21.70%	22.20%