Equity Roll Forward (Schedule Of Change In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			$ 8,128
Net earnings common stockholders	$ 369	$ 973	718	$ 1,498
Noncontrolling interests in earnings	8	6	11	10
Net earnings	377	979	729	1,508
Other comprehensive income (loss)	157	$ (398)	36	$ (699)
Cash dividends			(624)
Net purchases of common stock			(526)
Ending balance	7,743		7,743
Parent Company [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			8,081
Other comprehensive income (loss)			35
Cash dividends			(616)
Net purchases of common stock			(526)
Ending balance	7,692		7,692
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			47
Other comprehensive income (loss)			1
Cash dividends			(8)
Net purchases of common stock			0
Ending balance	$ 51		$ 51