Annual report pursuant to Section 13 and 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Details)

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Investments In Affiliates Accounted For Using The Equity Method (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method $ 1,641 $ 1,750
Liberty Sirius XM Group    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method $ 629 672
Liberty Sirius XM Group | Sirius XM Canada    
Schedule of Equity Method Investments [Line Items]    
Percentage ownership 70.00%  
Investments in affiliates, accounted for using the equity method $ 613 672
Liberty Sirius XM Group | Other    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method 16  
Braves Group    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method 92 145
Braves Group | Other    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method 92 145
Formula One Group    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method 920 933
Formula One Group | Other    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates, accounted for using the equity method $ 177 177
Formula One Group | Live Nation    
Schedule of Equity Method Investments [Line Items]    
Percentage ownership 33.00%  
Equity Method Investment, Quoted Market Value $ 3,430  
Investments in affiliates, accounted for using the equity method $ 743 $ 756
SIRIUS XM | Sirius XM Canada    
Schedule of Equity Method Investments [Line Items]    
Percentage ownership 70.00%