Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Net operating losses and tax credits	$ 396	$ 444
Accrued liabilities	238	319
Postretirement and postemployment benefits	37	70
Employee compensation and benefits	119	173
Pensions	0	72
Other	151	196
Total deferred tax assets	941	1,274
Valuation allowances	(341)	(309)
Intangibles	(693)	(753)
Pensions	(43)	0
Property, plant and equipment	(187)	(265)
Undistributed non-U.S. earnings	(52)	(249)
Other	(35)	(37)
Total deferred tax liabilities	(1,010)	(1,304)
Net deferred income tax liability	$ (410)	$ (339)