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)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Revenue disaggregated by source      
Revenue $ 9,363 $ 10,292 $ 8,040
Number of MLB clubs | item 30    
Braves Holdings      
Revenue disaggregated by source      
Revenue $ 178 476 442
Braves Holdings | Baseball      
Revenue disaggregated by source      
Revenue 142 438 404
Braves Holdings | Development      
Revenue disaggregated by source      
Revenue $ 36 $ 38 $ 38