Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Long-Term Debt - Fair Value of Debt (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis      
Long-term debt, measured at fair value $ 2,152   $ 3,861
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 $ 1,011    
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 $ 1,560    
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% 4.00%  
Long-term debt, measured at fair value $ 2,030    
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 $ 1,345    
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 $ 1,506    
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 $ 1,461    
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 $ 219