Quarterly report pursuant to Section 13 or 15(d)

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

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Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Deferred compensation contributions $ 6 $ 6  
Fair value of investment assets related to deferred compensation plan 36   $ 34
Unrealized gains (losses) on investments $ (5) $ 2