Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Income Tax Contingency [Line Items]
Change in valuation allowance tax benefit		$ 106,000,000
Income taxes paid	$ 34,000,000	19,000,000
Income tax refunds	$ 0	1,000,000
Tax Benefits of Discontinued Operations [Member] | Digital Education [Member]
Income Tax Contingency [Line Items]
Income tax benefit discontinued operations		$ 151,000,000