Segment Information - Reconciliation of Revenue and Segment EBITDA from Segments to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues									$ 9,008	$ 10,074	$ 9,024
Depreciation and amortization									(644)	(659)	(472)
Impairment and restructuring charges									(1,830)	(188)	(351)
Equity losses of affiliates									(47)	(17)	(1,006)
Interest expense, net									(25)	(59)	(7)
Other, net									9	33	(324)
(Loss) income before income tax expense									(1,524)	354	(1,089)
Income tax (expense) benefit									(21)	(126)	(355)
Net (loss) income	$ (401)	$ (1,036)	$ 103	$ (211)	$ (42)	$ 23	$ 119	$ 128	(1,545)	228	(1,444)
Digital Real Estate Services
Segment Reporting Information [Line Items]
Revenues									1,065	1,159	1,141
Total Segment EBITDA									345	378	401
Depreciation and amortization									(93)	(97)	(87)
Subscription Video Services
Segment Reporting Information [Line Items]
Revenues									1,884	2,202	1,004
Total Segment EBITDA									323	379	173
Depreciation and amortization									(283)	(292)	(107)
Dow Jones
Segment Reporting Information [Line Items]
Revenues									1,590	1,549	1,500
Total Segment EBITDA									236	208	193
Depreciation and amortization									(113)	(103)	(108)
Book Publishing
Segment Reporting Information [Line Items]
Revenues									1,666	1,754	1,758
Total Segment EBITDA									214	252	239
Depreciation and amortization									(33)	(42)	(52)
News Media
Segment Reporting Information [Line Items]
Revenues									2,801	3,407	3,619
Total Segment EBITDA									53	182	204
Depreciation and amortization									(115)	(120)	(115)
Other
Segment Reporting Information [Line Items]
Revenues									2	3	2
Total Segment EBITDA									(158)	(155)	(139)
Depreciation and amortization									$ (7)	$ (5)	$ (3)