Financial Instruments (Schedule Of Derivative Instruments) (Details) (USD $)	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	$ (4,000,000)	$ 24,000,000
Gain (Loss) to OCI	32,000,000	43,000,000
Notional value of foreign currency hedges	1,600,000,000
Weight of copper and aluminum for commodity hedges, in pounds	94,000,000
Foreign Currency Derivatives Receiving Deferral Accounting - Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	1,000,000	2,000,000
Gain (Loss) to OCI	4,000,000	4,000,000
Foreign Currency Derivatives Receiving Deferral Accounting - Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	(1,000,000)	5,000,000
Gain (Loss) to OCI	7,000,000	7,000,000
Commodity Derivatives Receiving Deferral Accounting - Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	(11,000,000)	10,000,000
Gain (Loss) to OCI	21,000,000	32,000,000
Foreign Currency Derivatives Not Receiving Deferral Accounting - Other Deductions, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	7,000,000	6,000,000
Commodity Derivatives Not Receiving Deferral Accounting - Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	$ 0	$ 1,000,000