v3.10.0.1
Document And Entity Information - shares
6 Months Ended
Dec. 31, 2018
Jan. 31, 2019
Entity Registrant Name MSG Networks Inc.  
Trading Symbol MSGN  
Entity Central Index Key 0001469372  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Dec. 31, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Emerging Growth Company false  
Entity Small Business false  
Class A Common Stock [Member]    
Entity Common Stock, Shares Outstanding   61,286,747
Class B Common Stock [Member]    
Entity Common Stock, Shares Outstanding   13,588,555