Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details Textual 1)

v2.4.1.9
Related Party Transactions (Details Textual 1) (USD $)
Share data in Millions, unless otherwise specified
1 Months Ended 12 Months Ended
Nov. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Liberty Media [Member] | Executives [Member]      
Related Party Transaction [Line Items]      
Number of Related Party Members on the Board of Directors   2siri_NumberofRelatedPartyMembersontheBoardofDirectors
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveOfficerMember
 
Liberty Media [Member] | Director [Member]      
Related Party Transaction [Line Items]      
Number of Related Party Members on the Board of Directors   1siri_NumberofRelatedPartyMembersontheBoardofDirectors
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Liberty Media [Member] | Common Stock [Member]      
Related Party Transaction [Line Items]      
Related party ownership percentage (greater than 50%)   50.00%siri_RelatedPartyTransactionRelatedPartyOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_LibertyMediaMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Sirius XM Canada [Member]      
Related Party Transaction [Line Items]      
Investment balance, carrying value   $ 2,654,000us-gaap_EquityMethodInvestments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_SiriusXmCanadaMember
$ 26,972,000us-gaap_EquityMethodInvestments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_SiriusXmCanadaMember
Sirius XM Canada shares owned (in shares)   47.3siri_EquityMethodInvestmentNumberofShares
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_SiriusXmCanadaMember
 
Equity method investment, ownership percentage   37.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_SiriusXmCanadaMember
 
Voting interest   25.00%siri_EquityMethodInvestmentVotingInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_SiriusXmCanadaMember
 
M-Way Solutions GmbH [Member]      
Related Party Transaction [Line Items]      
Investment balance, carrying value   0us-gaap_EquityMethodInvestments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_MWaySolutionsGmbHMember
 
Loss recognized for other than temporary decline in fair value of investments   2,342,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_MWaySolutionsGmbHMember
 
Loss on disposal of investment $ (353,000)us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= siri_MWaySolutionsGmbHMember