Revenues - Summary of Disaggregated Revenue by Type and by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 2,627	$ 2,180	$ 5,151	$ 4,238
Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,029	637	2,063	1,288
Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	718	717	1,382	1,399
Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	478	453	878	839
Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	248	222	475	425
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	154	151	353	287
News and Information Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,257	1,298	2,505	2,539
News and Information Services [Member] | Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	526		1,055
News and Information Services [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	632		1,208
News and Information Services [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
News and Information Services [Member] | Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
News and Information Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	99		242
Subscription Video Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	562	120	1,127	265
Subscription Video Services [Member] | Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	490		981
Subscription Video Services [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	55		112
Subscription Video Services [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Subscription Video Services [Member] | Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Subscription Video Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	17		34
Digital Real Estate Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	311	292	604	563
Digital Real Estate Services [Member] | Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	13		27
Digital Real Estate Services [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	31		62
Digital Real Estate Services [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Digital Real Estate Services [Member] | Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	248		475
Digital Real Estate Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	19		40
Book Publishing [Member]
Disaggregation of Revenue [Line Items]
Revenues	496	$ 469	914	$ 870
Book Publishing [Member] | Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Book Publishing [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Book Publishing [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	478		878
Book Publishing [Member] | Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Book Publishing [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	18		36
Other Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	1		1
Other Services [Member] | Circulation and Subscription [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Other Services [Member] | Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Other Services [Member] | Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Other Services [Member] | Real Estate [Member]
Disaggregation of Revenue [Line Items]
Revenues	0		0
Other Services [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 1		$ 1