Additional Financial Information - Components of Other, Net (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Gain on sale of marketable securities	[1]	$ 0	$ 0	$ 0	$ 29
Dividends received from cost method investments		0	3	0	20
Other, net		(6)	7	(1)	9
Total Other, net		$ (6)	$ 10	$ (1)	$ 58

[1] In August 2014, REA Group completed the sale of a minority interest held in marketable securities for total cash consideration of $104 million. As a result of the sale, REA Group recognized a pre-tax gain of $29 million, which was reclassified out of accumulated other comprehensive income and included in Other, net in the Statement of Operations.