Annual report pursuant to Section 13 and 15(d)

Investments In Affiliates Accounted For Using The Equity Method - Share Of Earnings (Losses) Of Affiliates (Details)

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Investments In Affiliates Accounted For Using The Equity Method - Share Of Earnings (Losses) Of Affiliates (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net $ 18 $ 104 $ 14
Liberty Sirius XM Group      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net (11) 29 13
Liberty Sirius XM Group | Other      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net (10)    
Liberty Sirius XM Group | Sirius XM Canada      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net (1) 29 13
Braves Group      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net 12 78 9
Braves Group | Other      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net 12 78 9
Braves Group | Braves Holdings      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net 69    
Formula One Group      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net 17 (3) (8)
Formula One Group | Live Nation      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net 3 (18) (12)
Formula One Group | Other      
Schedule of Equity Method Investments [Line Items]      
Share of earnings (losses) of affiliates, net $ 14 $ 15 $ 4