Equity Roll Forward (Schedule Of Change In Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2013			$ 10,718
Net earnings	738	214	1,769	1,258
Other comprehensive income (loss)	76	(37)	127	(20)
Cash dividends			(919)
Purchase of noncontrolling interest			(444)
Net purchases of common stock			(378)
Balance at June 30, 2014	10,873		10,873
Parent Company [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2013			10,585
Net earnings			1,737
Other comprehensive income (loss)			129
Cash dividends			(910)
Purchase of noncontrolling interest			(343)
Net purchases of common stock			(378)
Balance at June 30, 2014	10,820		10,820
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at September 30, 2013			133
Net earnings			32
Other comprehensive income (loss)			(2)
Cash dividends			(9)
Purchase of noncontrolling interest			(101)
Net purchases of common stock			0
Balance at June 30, 2014	$ 53		$ 53