Segment Information - Additional Information (Detail)	12 Months Ended
	Jun. 30, 2017 Country Brand Distributor Segment
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	5
Book Publishing [Member]
Segment Reporting Information [Line Items]
Number of countries | Country	18
Book Publishing [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Number of branded publishing imprints | Brand	120
Digital Real Estate Services [Member] | REA Group Inc [Member]
Segment Reporting Information [Line Items]
Company ownership percentage	61.60%
Digital Real Estate Services [Member] | Move Inc [Member]
Segment Reporting Information [Line Items]
Company ownership percentage	80.00%
Ownership percentage held by REA Group	20.00%
Cable Network Programming [Member]
Segment Reporting Information [Line Items]
Number of television channels distribution | Distributor	8