Additional Financial Information - Components of Other, Net Included in Statements of Operations (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2016	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Components of Other Income (Expense) [Line Items]
Impairment of marketable securities and cost method investments	[1]		$ (21)		$ (21)		$ (5)
Gain on sale of other businesses			19		2		0
Gain on sale of equity method investments			11		1		7
Gain on sale of marketable securities	[2]		7		1		29
Dividends received from cost method investments			3		0		25
Gain on sale of cost method investments			0		0		15
Other			6		6		4
Total Other, net			132		18		75
REA Group [Member]
Components of Other Income (Expense) [Line Items]
Gain on sale of business		$ 120	107	[3]	0	[3]	0	[3]
Gain on sale of marketable securities							29
REA Group [Member] | iProperty Group Limited [Member]
Components of Other Income (Expense) [Line Items]
Gain on iProperty transaction	[4]		$ 0		$ 29		$ 0

[1] See Note 6-Investments

[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.

[3] The Company recognized a pre-tax gain of $107 million for the fiscal year ended June 30, 2017 related to REA Group's sale of its European business. See Note 3-Acquisitions, Disposals and Other Transactions.

[4] See Note 3-Acquisitions, Disposals and Other Transactions.