Annual report pursuant to Section 13 and 15(d)

Basis of Presentation (Details)

v3.10.0.1
Basis of Presentation (Details) - USD ($)
$ in Millions
12 Months Ended 72 Months Ended
Jul. 23, 2014
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2018
Feb. 01, 2019
Jan. 23, 2017
Sep. 07, 2016
Nov. 04, 2014
Basis of Presentation                  
Number of shares received in spin-off                 0.25
Related Party Transaction, Amounts of Transaction   $ 30 $ 24 $ 21          
Stock Repurchased and Retired During Period, Shares     0 0          
Repurchases of Liberty common stock   466              
Starz                  
Basis of Presentation                  
Related Party Transaction, Amounts of Transaction   $ 4              
Common Class C | Liberty Media Corporation                  
Basis of Presentation                  
Number of shares issued during the period for each share of Series A and Series B stock held by shareholders prior to the distribution 2                
SIRIUS XM                  
Basis of Presentation                  
Stock Repurchased and Retired During Period, Shares         2,500,000,000        
Repurchases of Liberty common stock         $ 9,400        
Ownership Interest In Investee   73.00%     73.00% 67.00%      
Delta Topco                  
Basis of Presentation                  
Interest acquired (as a percent)             100.00% 20.00%  
Maximum | Delta Topco                  
Basis of Presentation                  
Interest acquired (as a percent)               20.00%