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Principles of Consolidation Principles of Consolidation - Additional Information (Details) - USD ($)
$ in Millions
Dec. 28, 2019
Sep. 28, 2019
May 13, 2019
Mar. 20, 2019
Sep. 25, 2017
Schedule of Equity Method Investments          
Redeemable Noncontrolling Interests $ 9,029 $ 8,963      
MLB | BAMTech, LLC          
Schedule of Equity Method Investments          
Redeemable Noncontrolling Interest, Equity, Redemption Value $ 670        
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          
Redeemable Noncontrolling Interest, Equity, Redemption Value         $ 500
NHL | BAMTech, LLC | Minimum          
Schedule of Equity Method Investments          
Redeemable Noncontrolling Interest, Equity, Redemption Value         300
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% 67.00%   60.00%  
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 $ 7,900