Revenues - Summary of Disaggregated Revenue by Type and by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 2,414	$ 2,479	$ 4,531	$ 4,819
Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	1,030	990	2,032	1,985
Advertising
Disaggregation of Revenue [Line Items]
Revenues	448	677	780	1,285
Consumer
Disaggregation of Revenue [Line Items]
Revenues	523	421	964	808
Real estate
Disaggregation of Revenue [Line Items]
Revenues	281	242	516	460
Other
Disaggregation of Revenue [Line Items]
Revenues	132	149	239	281
Digital Real Estate Services
Disaggregation of Revenue [Line Items]
Revenues	339	294	629	566
Digital Real Estate Services | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	8	9	16	19
Digital Real Estate Services | Advertising
Disaggregation of Revenue [Line Items]
Revenues	30	25	58	52
Digital Real Estate Services | Consumer
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Digital Real Estate Services | Real estate
Disaggregation of Revenue [Line Items]
Revenues	281	242	516	460
Digital Real Estate Services | Other
Disaggregation of Revenue [Line Items]
Revenues	20	18	39	35
Subscription Video Services
Disaggregation of Revenue [Line Items]
Revenues	511	501	1,007	1,015
Subscription Video Services | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	446	439	883	890
Subscription Video Services | Advertising
Disaggregation of Revenue [Line Items]
Revenues	55	53	105	104
Subscription Video Services | Consumer
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Subscription Video Services | Real estate
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Subscription Video Services | Other
Disaggregation of Revenue [Line Items]
Revenues	10	9	19	21
Dow Jones
Disaggregation of Revenue [Line Items]
Revenues	446	430	832	812
Dow Jones | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	319	296	630	585
Dow Jones | Advertising
Disaggregation of Revenue [Line Items]
Revenues	115	120	185	204
Dow Jones | Consumer
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Dow Jones | Real estate
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Dow Jones | Other
Disaggregation of Revenue [Line Items]
Revenues	12	14	17	23
Book Publishing
Disaggregation of Revenue [Line Items]
Revenues	544	442	1,002	847
Book Publishing | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Book Publishing | Advertising
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Book Publishing | Consumer
Disaggregation of Revenue [Line Items]
Revenues	523	421	964	808
Book Publishing | Real estate
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Book Publishing | Other
Disaggregation of Revenue [Line Items]
Revenues	21	21	38	39
News Media
Disaggregation of Revenue [Line Items]
Revenues	573	811	1,060	1,578
News Media | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	257	245	503	490
News Media | Advertising
Disaggregation of Revenue [Line Items]
Revenues	248	479	432	925
News Media | Consumer
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
News Media | Real estate
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
News Media | Other
Disaggregation of Revenue [Line Items]
Revenues	68	87	125	163
Other
Disaggregation of Revenue [Line Items]
Revenues	1	1	1	1
Other | Circulation and subscription
Disaggregation of Revenue [Line Items]
Revenues	0	1	0	1
Other | Advertising
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other | Consumer
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other | Real estate
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other | Other
Disaggregation of Revenue [Line Items]
Revenues	$ 1	$ 0	$ 1	$ 0