SEGMENT INFORMATION - Reconciliation of Revenue and Segment EBITDA from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting [Line Items]
Revenues	$ 9,028	$ 8,452	$ 8,252
Operating expenses	(3,892)	(3,736)	(3,814)
Selling, general and administrative	(3,509)	(3,301)	(3,197)
Total Segment EBITDA	1,627	1,415	1,241
Depreciation and amortization	(485)	(459)	(440)
Impairment and restructuring charges	(113)	(132)	(133)
Equity losses of affiliates	(8)	(15)	(6)
Interest (expense) income, net	29	3	(18)
Other, net	(4)	111	(59)
Income before income tax expense from continuing operations	1,046	923	585
Income tax expense from continuing operations	(303)	(275)	(206)
Net income from continuing operations	743	648	379
Net income (loss) from discontinued operations, net of tax	0	692	(25)
Net income	743	1,340	354
Dow Jones
Segment Reporting [Line Items]
Revenues	2,497	2,331	2,231
Operating expenses	(965)	(958)	(919)
Selling, general and administrative	(869)	(785)	(770)
Total Segment EBITDA	663	588	542
Depreciation and amortization	(164)	(156)	(153)
Digital Real Estate Services
Segment Reporting [Line Items]
Revenues	2,016	1,802	1,658
Operating expenses	(196)	(186)	(190)
Selling, general and administrative	(1,079)	(1,015)	(960)
Total Segment EBITDA	741	601	508
Depreciation and amortization	(155)	(146)	(137)
Book Publishing
Segment Reporting [Line Items]
Revenues	2,288	2,149	2,093
Operating expenses	(1,550)	(1,450)	(1,441)
Selling, general and administrative	(451)	(403)	(383)
Total Segment EBITDA	287	296	269
Depreciation and amortization	(60)	(54)	(54)
News Media
Segment Reporting [Line Items]
Revenues	2,227	2,170	2,270
Operating expenses	(1,181)	(1,142)	(1,264)
Selling, general and administrative	(907)	(875)	(873)
Total Segment EBITDA	139	153	133
Depreciation and amortization	(101)	(99)	(91)
Other
Segment Reporting [Line Items]
Revenues	0	0	0
Operating expenses	0	0	0
Selling, general and administrative	(203)	(223)	(211)
Total Segment EBITDA	(203)	(223)	(211)
Depreciation and amortization	$ (5)	$ (4)	$ (5)