Segment Information - Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions		Sep. 30, 2017	Jun. 30, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Investments		$ 2,044	$ 2,027
Total assets		14,662	14,552
News and Information Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets		6,170	6,142
Book Publishing [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets		1,868	1,845
Digital Real Estate Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets		2,351	2,307
Cable Network Programming [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets		1,219	1,194
Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	[1]	$ 1,010	$ 1,037

[1] The Other segment primarily includes Cash and cash equivalents.