Equity Roll Forward (Schedule Of Change In Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014	$ 10,167
Net earnings	529	477
Other comprehensive income (loss)	(301)	41
Cash dividends	(334)
Net purchases of common stock	(505)
Balance at December 31, 2014	9,556
Parent Company [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014	10,119
Net earnings	525
Other comprehensive income (loss)	(300)
Cash dividends	(326)
Net purchases of common stock	(505)
Balance at December 31, 2014	9,513
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014	48
Net earnings	4
Other comprehensive income (loss)	(1)
Cash dividends	(8)
Net purchases of common stock	0
Balance at December 31, 2014	$ 43