Changes in Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Income Tax Contingency [Line Items]
Balance, beginning of year	$ 7,202	$ 6,935	$ 6,542
Decreases related to settlements	(30)	(16)	(632)
Increases for tax positions related to the current year	612	481	739
Increases for tax positions related to prior years	931	118	405
Decreases for tax positions related to prior years	(65)	(292)	(119)
Decreases due to lapsed statutes of limitations	(2)	(24)	0
Balance, end of year	$ 8,648	$ 7,202	$ 6,935

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Paragraph 15A

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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-Publisher FASB

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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