Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - SIRIUS XM (Details)

v3.20.4
Summary of Significant Accounting Policies - Revenue recognition - Disaggregation of revenue - SIRIUS XM (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue disaggregated by source      
Revenue $ 9,363 $ 10,292 $ 8,040
Sirius XM Holdings      
Revenue disaggregated by source      
Revenue $ 8,040 7,794 5,771
Activation fees, recognition period 1 month    
Sirius XM Holdings | Minimum      
Revenue disaggregated by source      
Subscription period 3 months    
Sirius XM Holdings | Maximum      
Revenue disaggregated by source      
Subscription period 12 months    
Sirius XM Holdings | Subscriber      
Revenue disaggregated by source      
Revenue $ 6,372 6,120 5,264
Sirius XM Holdings | Advertising      
Revenue disaggregated by source      
Revenue 1,340 1,336 188
Sirius XM Holdings | Equipment      
Revenue disaggregated by source      
Revenue 173 173 155
Sirius XM Holdings | Other      
Revenue disaggregated by source      
Revenue $ 155 $ 165 $ 164