Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - Braves Holdings (Details)

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Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - Braves Holdings (Details) - Braves Group
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
item
Revenue disaggregated by source  
Number of MLB clubs | item 30
Corporate And Other  
Revenue disaggregated by source  
Revenue $ 442
Corporate And Other | Baseball  
Revenue disaggregated by source  
Revenue 404
Corporate And Other | Development  
Revenue disaggregated by source  
Revenue $ 38