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Description of Business and Basis of Presentation	12 Months Ended
Description of Business and Basis of Presentation	Jun. 30, 2020
Description of Business And Basis of Presentation [Abstract]
Description of Business	Description of Business and Basis of Presentation Description of Business MSG Networks Inc. (together with its subsidiaries, the “Company”), incorporated on July 29, 2009, owns and operates two regional sports and entertainment networks, MSG Network and MSG+, collectively “MSG Networks.” MSG Networks feature a wide range of compelling sports content, including exclusive live local games and other programming of the New York Knicks (the “Knicks”) of the National Basketball Association (“NBA”); the New York Rangers (the “Rangers”), New York Islanders (the “Islanders”), New Jersey Devils (the “Devils”) and Buffalo Sabres (the “Sabres”) of the National Hockey League (“NHL”); as well as significant coverage of the New York Giants and Buffalo Bills of the National Football League. On September 30, 2015 (the “Distribution Date”), the Company distributed to its stockholders all of the outstanding common stock of Madison Square Garden Sports Corp. (formerly, The Madison Square Garden Company) (together with its subsidiaries, “MSGS”) (the “Distribution”). The Company operates and reports financial information in one segment. Substantially all revenues and assets of the Company are attributed to or located in the United States and are primarily concentrated in the New York City metropolitan area.