SEGMENT INFORMATION - Reconciliation of Depreciation and Amortization, Capital Expenditures from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting [Line Items]
Total Depreciation and amortization	$ 485	$ 459	$ 440
Total Capital expenditures	426	407	357
Dow Jones
Segment Reporting [Line Items]
Total Depreciation and amortization	164	156	153
Total Capital expenditures	105	130	100
Digital Real Estate Services
Segment Reporting [Line Items]
Total Depreciation and amortization	155	146	137
Total Capital expenditures	160	154	131
Book Publishing
Segment Reporting [Line Items]
Total Depreciation and amortization	60	54	54
Total Capital expenditures	31	17	32
News Media
Segment Reporting [Line Items]
Total Depreciation and amortization	101	99	91
Total Capital expenditures	117	103	93
Other
Segment Reporting [Line Items]
Total Depreciation and amortization	5	4	5
Total Capital expenditures	$ 13	$ 3	$ 1