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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Related Party Transactions:    
Dr. John Malone's voting interest in Liberty Broadband (percentage) 48.80%  
Dr. John Malone's voting interest in Qurate Retail, Inc. (percentage) 40.90%  
Cash payments received from HSN, Inc. and QVC, Inc. $ 12 $ 12
Dr. John Malone's voting interest in Discovery Communications, Inc. for election of directors (percentage) 27.90%  
Advance Newhouse Programming Partnership's ownership percentage in Series A preferred stock of Discovery Communications, Inc. (percentage) 100.00%  
Advance Newhouse Programming Partnership's ownership percentage in Series C preferred stock of Discovery Communications, Inc. (percentage) 100.00%  
Advance Newhouse Programming Partnership's voting interest in Discovery Communications, Inc. for election of directors (percentage) 23.90%  
Maximum    
Related Party Transactions:    
Percent of total operating costs and expenses paid to Discovery Communications, Inc. and Starz (percentage) 2.00% 2.00%
Equity Method Investee    
Related Party Transactions:    
Payments to related parties $ 63 $ 86
Class A Common Stock    
Related Party Transactions:    
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 1.20%  
Class B Common Stock    
Related Party Transactions:    
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 93.60%  
Class C Common Stock    
Related Party Transactions:    
Dr. John Malone's ownership percentage in Discovery Communications, Inc. (percentage) 3.60%