Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.8.0.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2017
Jan. 29, 2018
Jun. 30, 2017
Document And Entity Information [Abstract]      
Entity Registrant Name SIRIUS XM HOLDINGS INC.    
Entity Central Index Key 0000908937    
Trading Symbol SIRI    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
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 Public Float     $ 7,957,495,699
Entity Common Stock, Shares Outstanding   4,491,863,747