INCOME TAXES, Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Effective income tax rate reconciliation, amount:
Provision calculated at statutory rate	$ 570	$ 555	$ 479
State income tax, net of federal benefit	79	87	83
Nondeductible executive compensation	18	13	13
Foreign tax rate differential	14	10	8
Gains on corporate-owned life insurance policies which are not subject to tax	(28)	(51)	(22)
Federal tax credits	(26)	(23)	(14)
Excess tax benefits related to share-based compensation	(44)	(20)	(21)
Nondeductible fines and penalties	0	(6)	18
Other, net	(4)	10	(3)
Total	$ 579	$ 575	$ 541
Effective income tax rate reconciliation, percent:
Provision calculated at statutory rate	21.00%	21.00%	21.00%
State income tax, net of federal benefit	2.90%	3.30%	3.60%
Nondeductible executive compensation	0.70%	0.50%	0.60%
Foreign tax rate differential	0.50%	0.40%	0.40%
Gains on corporate-owned life insurance policies which are not subject to tax	(1.00%)	(1.90%)	(1.00%)
Federal tax credits	(1.00%)	(1.00%)	(0.70%)
Excess tax benefits related to share-based compensation	(1.60%)	(0.80%)	(0.90%)
Nondeductible fines and penalties	0.00%	(0.20%)	0.80%
Other, net	(0.20%)	0.50%	(0.10%)
Total	21.30%	21.80%	23.70%
Restricted Stock Units | 2012 Stock Incentive Plan
Effective Income Tax Rate Reconciliation [Line Items]
Increase in fair value of awards	$ 200	$ 91	$ 95