Quarterly report pursuant to Section 13 or 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
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net $ 58 $ 155 $ 72 $ 167
Liberty Sirius XM Group        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net (2) 34 (2) 32
Liberty Sirius XM Group | Other        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net (3)   (3)  
Liberty Sirius XM Group | Sirius XM Canada        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 1 34 1 32
Braves Group        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 2 68 8 72
Braves Group | Other        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 2 68 8 72
Formula One Group        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 58 53 66 63
Formula One Group | Live Nation        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 54 43 57 51
Formula One Group | Other        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net $ 4 $ 10 $ 9 $ 12