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Principles of Consolidation Principles of Consolidation - Additional Information (Details) - USD ($)
$ in Millions
Apr. 03, 2021
Oct. 03, 2020
May 13, 2019
Sep. 25, 2017
Schedule of Equity Method Investments        
Redeemable Noncontrolling Interests $ 9,410 $ 9,249    
BAMTech, LLC        
Schedule of Equity Method Investments        
Equity Method Investment, Ownership Percentage 75.00%      
MLB | BAMTech, LLC        
Schedule of Equity Method Investments        
Equity Method Investment, Ownership Percentage 15.00%      
Redeemable Noncontrolling Interest, Equity, Redemption Value $ 738      
MLB | BAMTech, LLC | Minimum        
Schedule of Equity Method Investments        
Redeemable Noncontrolling Interest, Equity, Redemption Value       $ 563
Preferred Stock Return on NCI, Accretion Percentage       8.00%
NHL | BAMTech, LLC        
Schedule of Equity Method Investments        
Equity Method Investment, Ownership Percentage 10.00%      
Redeemable Noncontrolling Interest, Equity, Redemption Value       $ 500
Redeemable Noncontrolling Interests $ 338      
NHL | BAMTech, LLC | Maximum        
Schedule of Equity Method Investments        
Redeemable Noncontrolling Interest, Equity, Redemption Value       $ 350
Hulu LLC        
Schedule of Equity Method Investments        
Equity Method Investment, Ownership Percentage 67.00%      
Hulu LLC | Equity Interest Held by NBC Universal        
Schedule of Equity Method Investments        
Equity Method Investment, Ownership Percentage 33.00%      
Redeemable Noncontrolling Interest, Equity, Redemption Value     $ 27,500  
Redeemable Noncontrolling Interests $ 8,300