Income Taxes (Schedule Of Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Net operating losses and tax credits	$ 444	$ 164
Accrued liabilities	319	277
Postretirement and postemployment benefits	70	82
Employee compensation and benefits	173	206
Pensions	72	271
Other	196	158
Total deferred tax assets	1,274	1,158
Valuation allowances	(309)	(132)
Intangibles	(753)	(510)
Property, plant and equipment	(265)	(239)
Undistributed non-U.S. earnings	(249)	(9)
Other	(37)	(42)
Total deferred tax liabilities	(1,304)	(800)
Net deferred income tax asset		$ 226
Deferred Tax Liabilities, Net	$ 339