Financial Instruments (Schedule Of Derivative Instruments) (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012 lb	Jun. 30, 2011	Jun. 30, 2012 lb	Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	$ 7,000,000	$ 34,000,000	$ 4,000,000	$ 85,000,000
Gain (Loss) to OCI	(34,000,000)	3,000,000	57,000,000	48,000,000
Notional value of foreign currency hedges	2,000,000,000		2,000,000,000
Weight In Pounds Of The Copper And Aluminum Commodity Hedges Outstanding	79,000,000		79,000,000
Foreign Currency Derivatives Receiving Deferral Accounting - Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	(1,000,000)	2,000,000	1,000,000	8,000,000
Gain (Loss) to OCI	0	0	6,000,000	6,000,000
Foreign Currency Derivatives Receiving Deferral Accounting - Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	0	6,000,000	2,000,000	16,000,000
Gain (Loss) to OCI	(13,000,000)	5,000,000	22,000,000	15,000,000
Commodity Derivatives Receiving Deferral Accounting - Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	(9,000,000)	19,000,000	(31,000,000)	48,000,000
Gain (Loss) to OCI	(21,000,000)	(2,000,000)	29,000,000	27,000,000
Foreign Currency Derivatives Not Receiving Deferral Accounting - Other Deductions, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	$ 17,000,000	$ 7,000,000	$ 32,000,000	$ 13,000,000