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 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
May 18, 2016
Equity Method Investments and Operating Activities Segment [Line Items]          
Share of earnings (losses) of affiliates, net $ 18 $ 31 $ (3) $ 121  
Investment in Affiliate $ 3,051   $ 3,051    
Expedia          
Equity Method Investments and Operating Activities Segment [Line Items]          
Percentage ownership 16.00%   16.00%    
Liberty Broadband          
Equity Method Investments and Operating Activities Segment [Line Items]          
Investment in Affiliate         $ 2,400
QVC Group Common Stock          
Equity Method Investments and Operating Activities Segment [Line Items]          
Share of earnings (losses) of affiliates, net $ 8 13 $ 38 46  
QVC Group Common Stock | HSN, Inc.          
Equity Method Investments and Operating Activities Segment [Line Items]          
Percentage ownership 38.00%   38.00%    
Share of earnings (losses) of affiliates, net $ 9 15 $ 41 52  
QVC Group Common Stock | Other          
Equity Method Investments and Operating Activities Segment [Line Items]          
Share of earnings (losses) of affiliates, net (1) (2) (3) (6)  
Liberty Ventures common stock          
Equity Method Investments and Operating Activities Segment [Line Items]          
Share of earnings (losses) of affiliates, net 10 18 (41) 75  
Investment in Affiliate $ 3,051   $ 3,051    
Liberty Ventures common stock | Expedia          
Equity Method Investments and Operating Activities Segment [Line Items]          
Percentage ownership 16.00%   16.00%    
Share of earnings (losses) of affiliates, net $ 40 45 $ 18 125  
Liberty Ventures common stock | FTD          
Equity Method Investments and Operating Activities Segment [Line Items]          
Percentage ownership 37.00%   37.00%    
Share of earnings (losses) of affiliates, net $ (7) (14) $ (8) (9)  
Liberty Ventures common stock | Other          
Equity Method Investments and Operating Activities Segment [Line Items]          
Share of earnings (losses) of affiliates, net $ (23) $ (13) $ (51) $ (41)  
Liberty Ventures common stock | Liberty Broadband          
Equity Method Investments and Operating Activities Segment [Line Items]          
Percentage ownership 24.00%   24.00%