Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Net operating losses and tax credits	$ 407	$ 396
Accrued liabilities	228	238
Postretirement and postemployment benefits	36	37
Employee compensation and benefits	110	119
Pensions	95	0
Other	121	151
Total deferred tax assets	997	941
Valuation allowances	(307)	(341)
Intangibles	(637)	(693)
Pensions	0	(43)
Property, plant and equipment	(195)	(187)
Undistributed non-U.S. earnings	(49)	(52)
Other	(39)	(35)
Total deferred tax liabilities	(920)	(1,010)
Net deferred income tax liability	$ (230)	$ (410)