Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Net operating losses, capital losses and tax credits	$ 316	$ 487
Accrued liabilities	216	219
Postretirement and postemployment benefits	29	33
Employee compensation and benefits	149	119
Pensions	0	69
Other	128	137
Total deferred tax assets	838	1,064
Valuation allowances	(236)	(293)
Intangibles	(787)	(652)
Pensions	(107)	0
Property, plant and equipment	(212)	(212)
Undistributed non-U.S. earnings	(38)	(36)
Other	(54)	(33)
Total deferred tax liabilities	(1,198)	(933)
Net deferred income tax liability	$ (596)	$ (162)