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Segment Information - Additional Information (Detail)
6 Months Ended
Dec. 31, 2018
Segment
Item
Brand
Country
Apr. 30, 2018
Segment Reporting Information [Line Items]    
Number of reportable segments | Segment 5  
New Foxtel [Member]    
Segment Reporting Information [Line Items]    
Company ownership percentage   65.00%
New Foxtel [Member] | Telstra [Member]    
Segment Reporting Information [Line Items]    
Ownership interest held by minority interest   35.00%
Digital Real Estate Services [Member] | Move Inc [Member]    
Segment Reporting Information [Line Items]    
Company ownership percentage 80.00%  
Digital Real Estate Services [Member] | Move Inc [Member] | REA Group Inc [Member]    
Segment Reporting Information [Line Items]    
Ownership interest held by minority interest 20.00%  
Digital Real Estate Services [Member] | REA Group Inc [Member]    
Segment Reporting Information [Line Items]    
Company ownership percentage 61.60%  
Book Publishing [Member]    
Segment Reporting Information [Line Items]    
Number of countries | Country 17  
Book Publishing [Member] | Minimum [Member]    
Segment Reporting Information [Line Items]    
Number of branded publishing imprints | Brand 120  
Subscription Video Services [Member] | New Foxtel [Member]    
Segment Reporting Information [Line Items]    
Company ownership percentage 65.00%  
Subscription Video Services [Member] | New Foxtel [Member] | Telstra [Member]    
Segment Reporting Information [Line Items]    
Ownership interest held by minority interest 35.00%  
Subscription Video Services [Member] | Minimum [Member] | New Foxtel [Member]    
Segment Reporting Information [Line Items]    
Number of channels | Item 200