Equity Roll Forward (Schedule Of Change In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019	Oct. 01, 2018	Sep. 30, 2018	Jan. 01, 2018	Oct. 01, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 8,990
Net earnings common stockholders	$ 520	$ 482	985	$ 874
Foreign currency translation	88	148	53	155
Cash flow hedges	25	(5)	10	(8)
Common stockholders' equity	8,526	8,492	8,526	8,492			$ 8,947
Other comprehensive income	125	165	88	192
Ending balance	8,572	8,537	8,572	8,537
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ending balance	477	477	477	477
Additional paid-in-capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	375	306	348	297
Stock plans	5	17	32	26
Ending balance	380	323	380	323
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	23,252	22,079	23,072	21,995
Net earnings common stockholders	520	482	985	874
Dividends paid	(302)	(307)	(607)	(618)
Adoption of accounting standard updates					$ 5	$ 25		$ 0	$ 3
Ending balance	23,475	22,254	23,475	22,254
Accumulated other comprehensive income (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,052)	(992)	(1,015)	(1,019)
Foreign currency translation	87	148	52	155
Pension and postretirement	12	22	25	45
Cash flow hedges	25	(5)	10	(8)
Ending balance	(928)	(827)	(928)	(827)
Treasury stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(14,816)	(13,521)	(13,935)	(13,032)
Purchases	(75)	(250)	(1,000)	(750)
Issued under stock plans	13	36	57	47
Ending balance	(14,878)	(13,735)	(14,878)	(13,735)
Noncontrolling interests in subsidiaries
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	40	39	43	52
Dividends paid	0	(1)	(5)	(16)
Net earnings	5	7	7	9
Other comprehensive income	1	0	1	0
Ending balance	$ 46	$ 45	$ 46	$ 45