Additional Financial Information - Components of Other, Net (Parenthetical) (Detail) - USD ($) $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
		Aug. 31, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Components of Other Income (Expense) [Line Items]
Business acquisition recognized gain resulting from remeasurement of previously held equity interest	[1]		$ 29	$ 0	$ 29	$ 0
Gain on sale of marketable securities	[2]		0	$ 0	0	29
REA Group Inc [Member]
Components of Other Income (Expense) [Line Items]
Cash consideration on sale of marketable securities		$ 104
Gain on sale of marketable securities						$ 29
Other, Net [Member] | iProperty Group Limited [Member] | REA Group [Member]
Components of Other Income (Expense) [Line Items]
Business acquisition recognized gain resulting from remeasurement of previously held equity interest			$ 29		$ 29

[1] The Company recorded a $29 million gain resulting from the revaluation of REA Group's previously held equity interest in iProperty. See Note 2-Acquisitions, Disposals and Other Transactions.

[2] 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.