Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Fair Value of Debt (Details)

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Long-Term Debt - Fair Value of Debt (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Long-term debt, measured at fair value $ 2,306 $ 2,372
Liberty SiriusXM Group | Sirius XM 3.125% Senior Notes due 2026    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 3.125%  
Long-term debt, measured at fair value $ 945  
Liberty SiriusXM Group | Sirius XM 5.0% Senior Notes due 2027    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 5.00%  
Long-term debt, measured at fair value $ 1,500  
Liberty SiriusXM Group | Sirius XM 4.0% Senior Notes Due 2028    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 4.00%  
Long-term debt, measured at fair value $ 1,895  
Liberty SiriusXM Group | Sirius Xm 5.50% Senior Notes Due 2029    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 5.50%  
Long-term debt, measured at fair value $ 1,270  
Liberty SiriusXM Group | Sirius XM 4.125% Senior Notes Due 2030    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 4.125%  
Long-term debt, measured at fair value $ 1,403  
Liberty SiriusXM Group | Sirius XM 3.875% Senior Notes due 2031    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 3.875%  
Long-term debt, measured at fair value $ 1,365  
Liberty SiriusXM Group | Pandora 1.75% Convertible Senior Notes due 2023    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt instrument interest rate (as a percent) 1.75%  
Long-term debt, measured at fair value $ 222