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Quarterly Data - Schedule of Quarterly Financial Information (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Schedule Of Quarterly Financial Information [Line Items]              
Non-cash impairment charge         $ 280 $ 785 $ 0
Fixed-asset impairment charges     $ 464        
Australian Newspapers [Member]              
Schedule Of Quarterly Financial Information [Line Items]              
Non-cash impairment charge       $ 310      
Foxtel [Member]              
Schedule Of Quarterly Financial Information [Line Items]              
Investments written-off   $ 957   227      
News America Marketing and FOX SPORTS Australia [Member]              
Schedule Of Quarterly Financial Information [Line Items]              
Non-cash impairment charge   $ 225          
REA Group [Member]              
Schedule Of Quarterly Financial Information [Line Items]              
Gain on sale of business       120 $ 0 [1] $ 107 [1] $ 0 [1]
Impact of foreign currency fluctuations       $ 13      
Foxtel and Fox Sports Australia [Member] | Channel Distribution Agreements [Member]              
Schedule Of Quarterly Financial Information [Line Items]              
Write-off of intangible assets $ 317            
[1] The Company recognized a pre-tax gain of $107 million for the fiscal year ended June 30, 2017 related to REA Group's sale of its European business. See Note 3-Acquisitions, Disposals and Other Transactions.