Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Net operating losses, capital losses and tax credits	$ 487	$ 407
Accrued liabilities	219	228
Postretirement and postemployment benefits	33	36
Employee compensation and benefits	119	110
Pensions	69	95
Other	137	121
Total deferred tax assets	1,064	997
Valuation allowances	(293)	(307)
Intangibles	(652)	(637)
Property, plant and equipment	(212)	(195)
Undistributed non-U.S. earnings	(36)	(49)
Other	(33)	(39)
Total deferred tax liabilities	(933)	(920)
Net deferred income tax liability	$ (162)	$ (230)