Quarterly report pursuant to Section 13 or 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
Sep. 30, 2017
May 25, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method $ 1,772   $ 1,117
Liberty Sirius XM Group      
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method $ 680   164
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 $ 680   164
Braves Group      
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method 111   61
Braves Group | Other      
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method 111   61
Formula One Group      
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method 981   892
Formula One Group | Other      
Schedule of Equity Method Investments [Line Items]      
Investments in affiliates, accounted for using the equity method $ 176   161
Formula One Group | Live Nation      
Schedule of Equity Method Investments [Line Items]      
Percentage ownership 34.00%    
Equity Method Investment, Quoted Market Value $ 3,033    
Investments in affiliates, accounted for using the equity method $ 805   $ 731
SIRIUS XM | Sirius XM Canada      
Schedule of Equity Method Investments [Line Items]      
Percentage ownership   70.00%