Segment Information - Additional Information (Detail) - Jun. 30, 2015	Segment Distributor Brand
Segment Reporting Information [Line Items]
Number of reportable segments	6
Number of television channels distribution | Distributor	7
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%