INCOME TAXES, Deferred Tax Asset (Liability) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Deferred tax assets:
Deferred compensation	$ 287	$ 229
Allowances for credit losses	81	89
Unrealized loss associated with foreign currency translations	3	8
Unrealized loss associated with available-for-sale securities	2	0
Unrealized loss associated with cash flow hedges	9	18
Accrued expenses	46	34
Partnership investments	9	13
Lease liabilities	115	80
Other	18	16
Total deferred tax assets	570	487
Deferred tax liabilities:
Goodwill and identifiable intangible assets	(64)	(34)
Property and equipment	(85)	(81)
Lease ROU assets	(114)	(80)
Unrealized gain associated with available-for-sale securities	0	(30)
Other	(2)	0
Total deferred tax liabilities	(265)	(225)
Net deferred tax assets	305	262
Deferred income taxes, net	305	262
Cumulative amount of undistributed earnings attributable to foreign subsidiaries	331
Income tax receivable current	12	17
Accrued income taxes, current	$ 51	$ 82