Equity Roll Forward (Schedule Of Change In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014			$ 10,167
Net earnings	$ 574	$ 738	2,082	$ 1,769
Other comprehensive income (loss)	216	$ 76	(483)	$ 127
Cash dividends			(976)
Purchase of noncontrolling interest			(23)
Net purchases of common stock			(1,968)
Balance at June 30, 2015	8,799		8,799
Parent Company [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014			10,119
Other comprehensive income (loss)			(481)
Cash dividends			(960)
Purchase of noncontrolling interest			(23)
Net purchases of common stock			(1,968)
Balance at June 30, 2015	8,749		8,749
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2014			48
Other comprehensive income (loss)			(2)
Cash dividends			(16)
Purchase of noncontrolling interest			0
Net purchases of common stock			0
Balance at June 30, 2015	$ 50		$ 50