SEGMENT INFORMATION - Schedule of Reconciliation of Assets from Segments to Consolidated (Details) - USD ($) $ in Millions	Mar. 31, 2026	Jun. 30, 2025
Segment Reporting, Asset Reconciling Item [Line Items]
Investments	$ 1,000	$ 1,016
Total assets	15,516	15,504
Dow Jones
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,137	4,134
Digital Real Estate Services
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,412	3,202
Book Publishing
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,834	2,767
News Media
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,133	2,102
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,000	$ 2,283