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Income Taxes - Additional Information Regarding Examinations (Detail) (USD $) In Billions, unless otherwise specified			9 Months Ended
	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2013 Foreign Country Lower Limit	Mar. 31, 2013 Foreign Country Upper Limit	Mar. 31, 2013 Internal Revenue Service (IRS) Lower Limit	Mar. 31, 2013 Internal Revenue Service (IRS) Upper Limit
Income Tax Examination [Line Items]
Tax contingencies and other tax liabilities	$ 9.1	$ 7.6
Tax years under audit					2004	2006
Tax years subject to examination			1996	2012	2007	2012

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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