Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v2.4.0.6
Document and Entity Information
6 Months Ended
Jun. 30, 2012
Aug. 03, 2012
Document and Entity Information [Abstract]    
Entity Registrant Name SIRIUS XM RADIO INC.  
Entity Central Index Key 0000908937  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2012  
Document Fiscal Year Focus 2012  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   3,833,253,534
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes