Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Summary of Share Earnings (Losses) of Affiliates) (Details)

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Investments In Affiliates Accounted For Using The Equity Method (Summary of Share Earnings (Losses) of Affiliates) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
May 18, 2016
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net $ (27) $ 3    
Investment in Affiliate $ 3,688   $ 3,161  
Liberty Broadband        
Schedule of Equity Method Investments [Line Items]        
Investment in Affiliate       $ 2,400
Ownership Interest In Investee 24.00%      
QVC Group Common Stock        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net $ 14 21    
QVC Group Common Stock | HSN, Inc.        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net 16 22    
QVC Group Common Stock | Other        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net (2) (1)    
Liberty Ventures common stock        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net (41) (18)    
Investment in Affiliate 3,688      
Liberty Ventures common stock | FTD        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net (5) (3)    
Liberty Ventures common stock | Other        
Schedule of Equity Method Investments [Line Items]        
Share of earnings (losses) of affiliates, net $ (36) $ (15)