Equity (Schedule Of Change In Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Total Equity [Line Items]
Beginning balance			$ 10,551
Net earnings	787	698	1,724	1,756
Other comprehensive income/(loss)			(208)
Cash dividends			(918)
Net treasury stock purchases and other			(484)
Ending balance	10,665		10,665
Common Stockholders' Equity [Member]
Total Equity [Line Items]
Beginning balance			10,399
Net earnings			1,686
Other comprehensive income/(loss)			(205)
Cash dividends			(881)
Net treasury stock purchases and other			(480)
Ending balance	10,519		10,519
Noncontrolling Interests In Subsidiaries [Member]
Total Equity [Line Items]
Beginning balance			152
Net earnings			38
Other comprehensive income/(loss)			(3)
Cash dividends			(37)
Net treasury stock purchases and other			(4)
Ending balance	$ 146		$ 146