Equity (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Beginning balance			$ 9,952
Net earnings	698	601	1,756	1,456
Other comprehensive income			353
Cash dividends			(823)
Net treasury stock purchases and other			(239)
Ending balance	10,999		10,999
Common Stockholders' Equity [Member]
Beginning balance			9,792
Net earnings			1,719
Other comprehensive income			352
Cash dividends			(781)
Net treasury stock purchases and other			(238)
Ending balance	10,844		10,844
Noncontrolling Interests in Subsidiaries [Member]
Beginning balance			160
Net earnings			37
Other comprehensive income			1
Cash dividends			(42)
Net treasury stock purchases and other			(1)
Ending balance	$ 155		$ 155