Annual report pursuant to Section 13 and 15(d)

Debt - Fair Value of Debt (Details)

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Debt - Fair Value of Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Feb. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis            
Long-term debt, measured at fair value $ 2,416 $ 1,937        
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 $ 932          
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 $ 1,444          
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 $ 1,827          
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%       5.50%  
Long-term debt, measured at fair value $ 1,202          
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%     4.125%    
Long-term debt, measured at fair value $ 1,326          
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 $ 1,277          
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%         1.75%