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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Related Party Transactions:        
Dr. John Malone's voting interest in Qurate Retail, Inc. (percentage) 37.50%   37.50%  
Cash payments received from HSN, Inc. and QVC, Inc. $ 17 $ 16 $ 33 $ 33
Dr. John Malone's voting interest in Discovery Communications, Inc. for election of directors (percentage) 28.00%   28.00%  
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 24.20%   24.20%  
Dr. John Malone's equity ownership in Lions Gate's Class A voting shares (percentage) 7.90%   7.90%  
Dr. John Malone's equity ownership in Lions Gate's Class B non-voting shares (percentage) 5.50%   5.50%  
Dr. John Malone's voting interest in Lions Gate (percentage) 7.90%   7.90%  
Maximum [Member]        
Related Party Transactions:        
Carrying value of noncontrolling interst purchased     $ 400  
Percent of total operating costs and expenses paid to Discovery Communications, Inc. and Starz (percentage) 3.00% 3.00% 3.00% 3.00%
Equity Method Investee [Member]        
Related Party Transactions:        
Payments to related parties $ 86 $ 78 $ 149 $ 146
Class B Common Stock [Member]        
Related Party Transactions:        
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 93.60%   93.60%  
Common Class C [Member]        
Related Party Transactions:        
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 6.00%   6.00%