Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Income tax benefit, continuing operations	$ (49)	$ (65)	$ 42	$ (112)
Income taxes paid			57	50
Income tax refunds			1	$ 3
Digital Education [Member]
Income Tax Contingency [Line Items]
Income tax benefit, continuing operations			106
Assets of discontinued operations [Member] | Digital Education [Member]
Income Tax Contingency [Line Items]
Income tax benefit discontinued operations			$ 144