Derivative Instruments and Hedging Activities (Details 2) (USD $) In Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in CTA on Outstanding Derivatives (Effective Portion)	$ (5)	$ (4)	$ (5)	$ (4)
Amount of Gain (Loss) Recognized in Income on Derivative	1	(13)	51	41
Amount of Gain (Loss) Recognized in Income on Derivative	1	3	0	9
Foreign Currency Exchange Derivatives [Member] | Cost of Sales [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative	8	110	18	198
Foreign Currency Exchange Derivatives [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	2	1	6	(3)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	0	0	0	0
Foreign Currency Exchange Derivatives [Member] | Net Financing Charges [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative	(7)	(103)	(9)	(160)
Foreign Currency Exchange Derivatives [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	1	(1)	1	(1)
Commodity Derivatives [Member] | Cost of Sales [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative		1		1
Commodity Derivatives [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	7	(1)	26	1
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	0	0	0	0
Commodity Derivatives [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	5	(5)	5	(5)
Forward Treasury Locks [Member] | Net Financing Charges [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)		1	1	2
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	0	0	0	0
Forward Treasury Locks [Member] | Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	9	11	9	11
Interest Rate Swaps [Member] | Net Financing Charges [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative	12	4	14	4
Equity Swap [Member] | Selling, General And Administrative Expenses [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative		(21)	42	2
Fixed Rate Debt Swapped To Floating [Member] | Net Financing Charges [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in Income on Derivative	(11)	(1)	(14)	5
Cash Flow Hedging [Member]
Location and amount of gains and losses on derivative instruments and related hedge items
Amount of Gain (Loss) Recognized in AOCI on Derivative (Effective Portion)	15	5	15	5
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	9	1	33	0
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	$ 0	$ 0	$ 0	$ 0