Financial Instruments (Schedule Of Derivative Instruments) (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Notional value of foreign currency hedges	$ 1,500,000,000		$ 1,500,000,000
Gain (Loss) to Earnings	(3,000,000)	1,000,000	7,000,000	(3,000,000)
Gain (Loss) to OCI	2,000,000	59,000,000	(1,000,000)	91,000,000
Commodity Contract [Member] | Cash Flow Hedging [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to OCI	(11,000,000)	29,000,000	(16,000,000)	50,000,000
Commodity Contract [Member] | Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified to Earnings	(1,000,000)	(11,000,000)	(4,000,000)	(22,000,000)
Foreign Exchange Contract [Member] | Other Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to Earnings	(9,000,000)	8,000,000	0	15,000,000
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) to OCI	13,000,000	30,000,000	15,000,000	41,000,000
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member] | Sales and Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified to Earnings	7,000,000	4,000,000	11,000,000	4,000,000
Copper and Aluminum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Weight In Pounds of Copper and Aluminum Commodity Hedges	68,000,000		68,000,000
Amount of Copper and Aluminum Hedged	$ 195,000,000		$ 195,000,000