Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v2.4.1.9
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2014
Feb. 03, 2015
Jun. 30, 2014
Document and Entity Information [Abstract]      
Entity Registrant Name SIRIUS XM HOLDINGS INC.    
Entity Central Index Key 0000908937    
Document Type 10-K    
Document Period End Date Dec. 31, 2014    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   5,581,438,748dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 8,827,437,630dei_EntityPublicFloat