Equity Roll Forward (Schedule Of Change In Equity) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2015	$ 8,128
Net earnings common stockholders	349	$ 525
Noncontrolling interests in earnings	3	4
Net earnings	352	529
Other comprehensive income (loss)	(121)	$ (301)
Cash dividends	(319)
Net purchases of common stock	(543)
Balance at December 31, 2015	7,497
Parent Company [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2015	8,081
Other comprehensive income (loss)	(121)
Cash dividends	(310)
Net purchases of common stock	(543)
Balance at December 31, 2015	7,456
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2015	47
Other comprehensive income (loss)	0
Cash dividends	(9)
Net purchases of common stock	0
Balance at December 31, 2015	$ 41