Equity Roll Forward (Schedule Of Change In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 8,770
Net earnings	$ 489	$ 300	883	$ 615
Other comprehensive income (loss)	165	$ 341	192	$ 308
Cash dividends			(634)
Purchases of treasury stock, net of issuances			(677)
Adoption of accounting standard update	3		3
Ending balance	8,537		8,537
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			8,718
Ending balance	8,492		8,492
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings			874
Cash dividends			(618)
Adoption of accounting standard update	3		3
AOCI Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)			192
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchases of treasury stock, net of issuances			(677)
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			52
Net earnings			9
Other comprehensive income (loss)			0
Cash dividends			(16)
Purchases of treasury stock, net of issuances			0
Adoption of accounting standard update	0		0
Ending balance	$ 45		$ 45