Additional Financial Information - Components of Other, Net Included in Statements of Operations (Parenthetical) (Detail) € in Millions, $ in Millions		1 Months Ended		3 Months Ended				9 Months Ended
		Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Mar. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	[2]	Mar. 31, 2016 USD ($)
iProperty Group Limited [Member]
Components of Other Income (Expense) [Line Items]
Gain on iProperty transaction	[1]						$ 29			$ 29
REA Group [Member]
Components of Other Income (Expense) [Line Items]
Cash consideration of sale of business		$ 140	€ 133
Gain on sale of business				$ (13)	[2]	$ 120		$ 107
REA Group [Member] | Other, Net [Member]
Components of Other Income (Expense) [Line Items]
Gain on sale of business				$ 13

[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 December 2016, REA Group sold its European business for approximately $140 million (approximately € 133 million) in cash, which resulted in a pre-tax gain of $120 million in the second quarter of fiscal 2017. The gain was partially offset in the third quarter of fiscal 2017 by $13 million related to the impact of foreign currency fluctuations on the receipt of the sales proceeds, which were received in February 2017, and certain other currency translation impacts. The sale allows REA Group to focus on its core businesses in Australia and Asia.