Income Taxes - Additional Information Regarding Examinations (Detail) (USD $) In Billions, unless otherwise specified	9 Months Ended
	Mar. 31, 2015	Jun. 30, 2014
Income Tax Examination [Line Items]
Tax contingencies and other tax liabilities	11.8	$ 10.4
Internal Revenue Service (IRS) | Earliest Tax Year
Income Tax Examination [Line Items]
Tax years under audit	2004
Tax years subject to examination	2007
Internal Revenue Service (IRS) | Latest Tax Year
Income Tax Examination [Line Items]
Tax years under audit	2006
Tax years subject to examination	2014
Foreign Country | Earliest Tax Year
Income Tax Examination [Line Items]
Tax years subject to examination	1996
Foreign Country | Latest Tax Year
Income Tax Examination [Line Items]
Tax years subject to examination	2014