Risk Management Activities and Fair Value Measurements - Gains and Losses on Qualifying and Non-Qualifying Financial Instruments used in Hedging Transactions (Detail) (USD $) In Millions	3 Months Ended				12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Jun. 30, 2011
Derivatives in Cash Flow Hedging Relationships
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ 40				$ 50
Amount of Gain (Loss) Reclassified from AOCI into Income	(42)	[1]	(33)	[1]
Derivatives in Cash Flow Hedging Relationships | Interest Rate
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	14				15
Amount of Gain (Loss) Reclassified from AOCI into Income	2	[1]	2	[1]
Derivatives in Cash Flow Hedging Relationships | Foreign currency hedges
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	25				32
Amount of Gain (Loss) Reclassified from AOCI into Income	(45)	[1]	(49)	[1]
Derivatives in Cash Flow Hedging Relationships | Commodities
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	1				3
Amount of Gain (Loss) Reclassified from AOCI into Income	1	[1]	14	[1]
Derivatives in Net Investment Hedging Relationships
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(111)				(88)
Amount of Gain (Loss) Recognized in Income	(3)	[2]	0	[2]
Derivatives in Fair Value Hedging Relationships
Amount of Gain (Loss) Recognized in Income	(2)	[2]	(1)	[2]
Derivatives in Fair Value Hedging Relationships | Interest Rate
Amount of Gain (Loss) Recognized in Income	131	[2]	62	[2]
Derivatives in Fair Value Hedging Relationships | Debt
Amount of Gain (Loss) Recognized in Income	(133)	[2]	(63)	[2]
Derivatives Not Designated as Hedging Instruments
Amount of Gain (Loss) Recognized in Income	(582)	[3]	738	[3]
Derivatives Not Designated as Hedging Instruments | Foreign currency hedges
Amount of Gain (Loss) Recognized in Income	(581)	[3]	736	[3]
Derivatives Not Designated as Hedging Instruments | Commodities
Amount of Gain (Loss) Recognized in Income	$ (1)	[3]	$ 2	[3]

[1] The gain or loss on the effective portion of cash flow hedging relationships is reclassified from accumulated OCI into net income in the same period during which the related item affects earnings. Such amounts are included in the Consolidated Statements of Earnings as follows: interest rate contracts in interest expense, foreign currency contracts in selling, general and administrative expense and interest expense and commodity contracts in cost of products sold.

[2] The gain or loss on the ineffective portion of interest rate contracts and net investment hedges, if any, is included in the Consolidated Statements of Earnings in interest expense.

[3] The gain or loss on contracts not designated as hedging instruments is included in the Consolidated Statements of Earnings as follows: foreign currency contracts in selling, general and administrative expense and commodity contracts in cost of products sold.