Segment Information - Reconciliation of Assets from Segments to Consolidated (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Segment Reporting, Asset Reconciling Item [Line Items]
Investments	$ 314	$ 297
Total assets	14,400	14,261
Digital Real Estate Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,335	2,322
Subscription Video Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,513	3,459
Dow Jones
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,435	2,480
Book Publishing
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,233	2,212
News Media
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,075	1,994
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,495	$ 1,497