Reconciliation of Total Assets Measured at Fair Value on a Recurring Basis to the Balance Sheet Presentation (Detail) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net fair value of assets measured at fair value on a recurring basis	$ 61,058	$ 42,645
Less derivative assets classified as other current assets	(54)	(544)
Other	1	62
Recorded basis of investment components	63,637	44,542
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	1,648	1,661
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common and preferred stock measured at fair value on a nonrecurring basis	334	216
Other investments measured at fair value on a nonrecurring basis	$ 650	$ 502