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, unless otherwise specified	Dec. 31, 2011		Jun. 30, 2011
Assets at fair value:
Investment securities	$ 29		$ 39
Total assets at fair value	341	[1]	389	[1]
Liabilities at fair value:
Total liabilities at fair value	511	[2]	301	[2]
Foreign currency hedges
Assets at fair value:
Derivative assets	0		1
Liabilities at fair value:
Derivative liabilities	169		119
Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	30	[3]	182	[3]
Liabilities at fair value:
Derivative liabilities	272	[3]	43	[3]
Interest Rate
Assets at fair value:
Derivative assets	275		163
Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	6		0
Liabilities at fair value:
Derivative liabilities	70		138
Commodities
Assets at fair value:
Derivative assets	1		4
Liabilities at fair value:
Derivative liabilities	0		1
Fair Value, Inputs, Level 1
Assets at fair value:
Investment securities	7		16
Total assets at fair value	7	[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	312	[1]	350	[1]
Liabilities at fair value:
Total liabilities at fair value	511	[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	169		119
Fair Value, Inputs, Level 2 | Other Foreign Currency Instruments
Assets at fair value:
Derivative assets	30	[3]	182	[3]
Liabilities at fair value:
Derivative liabilities	272	[3]	43	[3]
Fair Value, Inputs, Level 2 | Interest Rate
Assets at fair value:
Derivative assets	275		163
Fair Value, Inputs, Level 2 | Derivatives in Net Investment Hedging Relationships
Assets at fair value:
Derivative assets	6		0
Liabilities at fair value:
Derivative liabilities	70		138
Fair Value, Inputs, Level 2 | Commodities
Assets at fair value:
Derivative assets	1		4
Liabilities at fair value:
Derivative liabilities	0		1
Fair Value, Inputs, Level 3
Assets at fair value:
Investment securities	22		23
Total assets at fair value	22	[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

[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.