Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Net operating losses and tax credits	$ 164	$ 138
Accrued liabilities	277	245
Postretirement and postemployment benefits	82	86
Employee compensation and benefits	206	168
Pensions	271	164
Other	158	161
Total deferred tax assets	1,158	962
Valuation allowances	(132)	(109)
Intangibles	(510)	(500)
Property, plant and equipment	(239)	(236)
Other	(51)	(51)
Total deferred tax liabilities	(800)	(787)
Net deferred income tax asset	$ 226	$ 66