Income Taxes (Schedule Of Principal Components Of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Current: U.S. Federal	$ 152	$ 123	$ 247
Current: State and local	26	15	24
Current: Non-U.S.	355	288	308
Deferred: U.S. Federal	81	(44)	(2)
Deferred: State and local	(2)	1	12
Deferred: Non-U.S.	(27)	(38)	(58)
Income tax expense	$ 585	$ 345	$ 531