Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Narrative) (Details)

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Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Retirement Benefits [Abstract]          
Net withdrawals $ (2) $ (1) $ (1)    
Net contributions       $ 1  
Fair value of investment assets related to deferred compensation plan 59   59   $ 53
Gains (losses) on investments $ 2 $ (1) $ 7 $ 4