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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Related Party Transactions:        
Dr. John Malone's voting interest in Liberty Broadband (percentage) 49.00%   49.00%  
Dr. John Malone's voting interest in Qurate Retail, Inc. (percentage) 39.90%   39.90%  
Cash payments received from HSN, Inc. and QVC, Inc. $ 11 $ 18 $ 35 $ 51
Dr. John Malone's voting interest in Discovery Communications, Inc. for election of directors (percentage) 28.20%   28.20%  
Advance Newhouse Programming Partnership's ownership percentage in Series A preferred stock of Discovery Communications, Inc. (percentage) 100.00%   100.00%  
Advance Newhouse Programming Partnership's ownership percentage in Series C preferred stock of Discovery Communications, Inc. (percentage) 100.00%   100.00%  
Advance Newhouse Programming Partnership's voting interest in Discovery Communications, Inc. for election of directors (percentage) 24.10%   24.10%  
Maximum        
Related Party Transactions:        
Percent of total operating costs and expenses paid to Discovery Communications, Inc. and Starz (percentage) 2.00% 2.00% 2.00% 2.00%
Equity Method Investee        
Related Party Transactions:        
Payments to related parties $ 78 $ 99 $ 245 $ 248
Class A Common Stock        
Related Party Transactions:        
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 1.20%   1.20%  
Class B Common Stock        
Related Party Transactions:        
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 93.60%   93.60%  
Class C Common Stock        
Related Party Transactions:        
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 2.60%   2.60%