Annual report pursuant to Section 13 and 15(d)

Business & Basis of Presentation (Details)

v3.20.4
Business & Basis of Presentation (Details)
subscriber in Millions
12 Months Ended
Oct. 16, 2020
USD ($)
Jun. 16, 2020
USD ($)
Dec. 31, 2020
USD ($)
segment
satellite_radio_system
subscriber
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Feb. 10, 2020
USD ($)
Related Party Transaction [Line Items]            
Number of reportable segments | segment     2      
Number of satellite radio systems | satellite_radio_system     2      
Loss on restructuring     $ 24,000,000 $ 0 $ 0  
Automatic Labs Inc. | Disposal Group, Not Discontinued Operations            
Related Party Transaction [Line Items]            
Loss on restructuring     $ 24,000,000      
Simplecast            
Related Party Transaction [Line Items]            
Payments to acquire businesses, gross   $ 28,000,000        
Stitcher            
Related Party Transaction [Line Items]            
Consideration for acquisition $ 296,000,000          
Payments to acquire businesses, gross 272,000,000          
Contingent consideration, liability 30,000,000          
Working capital adjustments $ 6,000,000          
SoundCloud Holdings, LLC            
Related Party Transaction [Line Items]            
Equity method investments           $ 75,000,000
Equity Method Investee | Sirius XM Canada            
Related Party Transaction [Line Items]            
Equity method investment, equity interest percentage     70.00%      
Equity method investment, voting interest percentage     33.00%      
Equity method investments     $ 332,000,000 $ 321,000,000    
Common Stock | Management | Liberty Media            
Related Party Transaction [Line Items]            
Related party ownership percentage     76.00%      
Sirius XM            
Related Party Transaction [Line Items]            
Number of subscribers | subscriber     34.7      
Pandora            
Related Party Transaction [Line Items]            
Number of subscribers | subscriber     6.3