Income Taxes (Schedule Of Principal Components Of Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Current: U.S. Federal	$ 247	$ 341	$ 351
Current: State and local	24	52	40
Current: Non-U.S.	308	300	311
Deferred: U.S. Federal	(2)	(224)	7
Deferred: State and local	12	(11)	4
Deferred: Non-U.S.	(58)	(15)	(53)
Income tax expense	$ 531	$ 443	$ 660