v3.26.1
Benefit Plans - Sirius XM Holdings Awards (Details) - USD ($)
shares in Millions, $ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Employees and Non Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options exercised in period, intrinsic value $ 1 $ 1  
Exercise of options and RSU vestings in period (in shares) 1    
Restricted Stock Units (RSUs) and Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units vested, intrinsic value $ 106 $ 38  
Granted (in shares) 11    
Restricted stock units granted (in shares) 1    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise of options and RSU vestings in period (in shares)   3  
Performance-based Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 1    
Restricted Stock Units Rsu And Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation costs $ 436   $ 355
Weighted-average service period (in years) 2 years 8 months 12 days