v3.19.1
Document and Entity Information - shares
9 Months Ended
Mar. 31, 2019
May 07, 2019
Document And Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name FOX CORPORATION  
Entity Central Index Key 0001754301  
Current Fiscal Year End Date --06-30  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Class A Common Stock    
Document And Entity Information [Line Items]    
Trading Symbol FOXA  
Entity Common Stock, Shares Outstanding   354,351,378
Class B Common Stock    
Document And Entity Information [Line Items]    
Trading Symbol FOX  
Entity Common Stock, Shares Outstanding   266,173,651