Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Deferred compensation contributions $ 7 $ 8 $ 8
Fair value of investment assets related to deferred compensation plan 34 22  
Unrealized gains (losses) on investments $ 3 $ (1)