Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Tax Contingency [Line Items]
Income tax benefit, continuing operations	$ 91	$ (47)
Income taxes paid	19	19
Income tax refunds	1	3
Digital Education [Member]
Income Tax Contingency [Line Items]
Income tax benefit, continuing operations	106
Income tax benefit discontinued operations	$ 168	$ 10