Risk Management Activities and Fair Value Measurements - Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Millions	Sep. 30, 2011		Jun. 30, 2011
Assets at fair value:
Investment securities	$ 33		$ 39
Total assets at fair value	385	[1]	389	[1]
Liabilities at fair value:
Total liabilities at fair value	720	[2]	301	[2]
Fair Value, Inputs, Level 1
Assets at fair value:
Investment securities	10		16
Total assets at fair value	10	[1]	16	[1]
Liabilities at fair value:
Total liabilities at fair value	0	[2]	0	[2]
Fair Value, Inputs, Level 1 | Foreign currency hedges
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Fair Value, Inputs, Level 1 | Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	0	[3]	0	[3]
Liabilities at fair value:
Derivative liabilities	0	[3]	0	[3]
Fair Value, Inputs, Level 1 | Interest Rate
Assets at fair value:
Derivative assets	0		0
Fair Value, Inputs, Level 1 | Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Fair Value, Inputs, Level 1 | Commodities
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Fair Value, Inputs, Level 2
Assets at fair value:
Investment securities	0		0
Total assets at fair value	352	[1]	350	[1]
Liabilities at fair value:
Total liabilities at fair value	720	[2]	301	[2]
Fair Value, Inputs, Level 2 | Foreign currency hedges
Assets at fair value:
Derivative assets	0		1
Liabilities at fair value:
Derivative liabilities	174		119
Fair Value, Inputs, Level 2 | Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	49	[3]	182	[3]
Liabilities at fair value:
Derivative liabilities	361	[3]	43	[3]
Fair Value, Inputs, Level 2 | Interest Rate
Assets at fair value:
Derivative assets	295		163
Fair Value, Inputs, Level 2 | Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	5		0
Liabilities at fair value:
Derivative liabilities	182		138
Fair Value, Inputs, Level 2 | Commodities
Assets at fair value:
Derivative assets	3		4
Liabilities at fair value:
Derivative liabilities	3		1
Fair Value, Inputs, Level 3
Assets at fair value:
Investment securities	23		23
Total assets at fair value	23	[1]	23	[1]
Liabilities at fair value:
Total liabilities at fair value	0	[2]	0	[2]
Fair Value, Inputs, Level 3 | Foreign currency hedges
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Fair Value, Inputs, Level 3 | Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	0	[3]	0	[3]
Liabilities at fair value:
Derivative liabilities	0	[3]	0	[3]
Fair Value, Inputs, Level 3 | Interest Rate
Assets at fair value:
Derivative assets	0		0
Fair Value, Inputs, Level 3 | Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Fair Value, Inputs, Level 3 | Commodities
Assets at fair value:
Derivative assets	0		0
Liabilities at fair value:
Derivative liabilities	0		0
Foreign currency hedges
Assets at fair value:
Derivative assets	0		1
Liabilities at fair value:
Derivative liabilities	174		119
Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	49	[3]	182	[3]
Liabilities at fair value:
Derivative liabilities	361	[3]	43	[3]
Interest Rate
Assets at fair value:
Derivative assets	295		163
Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	5		0
Liabilities at fair value:
Derivative liabilities	182		138
Commodities
Assets at fair value:
Derivative assets	3		4
Liabilities at fair value:
Derivative liabilities	$ 3		$ 1

[1] Investment securities are presented in other noncurrent assets and all derivative assets are presented in prepaid expenses and other current assets or other noncurrent assets.

[2] All liabilities are presented in accrued and other liabilities or other noncurrent liabilities.

[3] Other foreign currency instruments are comprised of foreign currency financial instruments that do not qualify as hedges.