Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.10.0.1
Stockholders' Equity (Details)
 12 Months Ended 72 Months Ended
Jan. 29, 2019
$ / shares
Nov. 30, 2016
USD ($)
Oct. 26, 2016
$ / shares
Jul. 23, 2014
shares
Dec. 31, 2018
USD ($)
Vote / shares
$ / shares
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Preferred stock, shares issued         0 0   0
Stock Repurchased and Retired During Period, Shares           0 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value | $         $ 22,000,000 $ 31,000,000 $ 24,000,000  
Payments for Repurchase of Common Stock | $         $ 466,000,000      
Formula One Group                
Stock reserved for future issuance         7,000,000     7,000,000
Braves Group                
Stock reserved for future issuance         1,500,000     1,500,000
Liberty Sirius XM Group                
Payments for Repurchase of Common Stock | $         $ 466,000,000      
Stock reserved for future issuance         12,900,000     12,900,000
Common Class A                
Votes per share | Vote / shares         1      
Number of shares received in exchange for a share of Series B         1      
Common Class A | Formula One Group                
Stock repurchased during period | $         $ 0      
Common Class A | Braves Group                
Stock repurchased during period (Shares)         0      
Common Class B                
Votes per share | Vote / shares         10      
Common Class C                
Votes per share | Vote / shares         0      
Common Class C | Formula One Group                
Stock repurchased during period (Shares)         0      
Common Class C | Liberty Media Corporation                
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        
Common Class C | Braves Group                
Stock repurchased during period (Shares)         0      
SIRIUS XM                
Payments of Dividends | $         $ 201,000,000      
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees | $         $ 143,000,000      
SIRIUS XM | Common Class C                
Stock repurchased during period (Shares)         10,800,000      
SIRIUS XM                
Stock Repurchased and Retired During Period, Shares               2,500,000,000
Payments for Repurchase of Common Stock | $               $ 9,400,000,000
Common Stock, Dividends, Per Share, Declared | $ / shares $ 0.0121       $ 0.0484      
Payments of Dividends | $           190,000,000    
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees | $           $ 130,000,000    
SIRIUS XM | Quarterly                
Common Stock, Dividends, Per Share, Declared | $ / shares     $ 0.01          
Payments of Dividends | $   $ 48,000,000            
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Subsidiaries and Equity Method Investees | $   $ 32,000,000            
SIRIUS XM | Common Class A                
Stock repurchased during period (Shares)         0      
SIRIUS XM | Common Class C                
Stock repurchased during period | $         $ 466,000,000