Quarterly report [Sections 13 or 15(d)]

Business & Basis of Presentation (Details)

v3.25.2
Business & Basis of Presentation (Details)
$ / shares in Units, subscriber in Millions
3 Months Ended 6 Months Ended
Sep. 09, 2024
$ / shares
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
subscriber
satelliteRadioSystem
$ / shares
Jun. 30, 2024
USD ($)
Dec. 31, 2024
$ / shares
Jun. 16, 2024
Related Party Transaction [Line Items]              
Common stock, par value (in USD per share) | $ / shares $ 0.001 $ 0.001   $ 0.001   $ 0.001  
Conversion ratio 0.1     0.10      
Number of reportable segments | segment       2      
Number of operating segments | segment       2      
Number of satellite radio systems | satelliteRadioSystem       2      
Merger related costs | $   $ 0 $ 6,000,000 $ 0 $ 12,000,000    
Acquisition related costs | $   $ 0 $ 18,000,000 $ 0 $ 37,000,000    
Pandora              
Related Party Transaction [Line Items]              
Number of subscribers | subscriber       5.7      
Sirius XM Holdings, Inc.              
Related Party Transaction [Line Items]              
Redemption ratio             0.1
Liberty Sirius XM              
Related Party Transaction [Line Items]              
Common stock, par value (in USD per share) | $ / shares $ 0.01            
Redemption ratio 0.8375            
Sirius XM Canada | Equity Method Investee              
Related Party Transaction [Line Items]              
Equity method investment, equity interest percentage   70.00%   70.00%      
Equity method investment, voting interest percentage   33.00%   33.00%      
SiriusXM              
Related Party Transaction [Line Items]              
Number of subscribers | subscriber       32.8