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Principles of Consolidation Principles of Consolidation - Additional Information (Details) - USD ($)
$ in Millions
Aug. 03, 2021
Jul. 03, 2021
Oct. 03, 2020
May 13, 2019
Sep. 25, 2017
Schedule of Equity Method Investments          
Redeemable Noncontrolling Interests   $ 9,492 $ 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   $ 752      
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   $ 350      
NHL | BAMTech, LLC | Subsequent Event          
Schedule of Equity Method Investments          
Redeemable Noncontrolling Interest, Equity, Redemption Value $ 350        
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