Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details Textual)

v2.4.1.9
Commitments and Contingencies (Details Textual) (USD $)
12 Months Ended 1 Months Ended 2 Months Ended 1 Months Ended 35 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
state
Sep. 30, 2013
claim
Aug. 31, 2013
Dec. 31, 2014
suit
Commitments and Contingencies (Textual) [Abstract]              
Agreement term to repurchase certain products shipped to distributor from date of shipment (after 90 days) 90 days            
Operating leases, rent expense $ 45,107,000us-gaap_OperatingLeasesRentExpenseNet $ 39,228,000us-gaap_OperatingLeasesRentExpenseNet $ 37,474,000us-gaap_OperatingLeasesRentExpenseNet        
Minimum [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Operating lease obligations, term 1 year            
Maximum [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Operating lease obligations, term 15 years            
XM-5, FM-5, FM-6, XM-3, and XM-4 [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Operating performance over design life 15 years            
XM-4 [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Additional payments required if XM-4 continues to operate above baseline specifications 10,000,000siri_AdditionalExpenseIncurredIfBaselineSpecificationsAreExceeded
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= siri_XmFourSatelliteMember
    10,000,000siri_AdditionalExpenseIncurredIfBaselineSpecificationsAreExceeded
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= siri_XmFourSatelliteMember
    10,000,000siri_AdditionalExpenseIncurredIfBaselineSpecificationsAreExceeded
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= siri_XmFourSatelliteMember
Period beyond expected operating performance of design life for XM-4 5 years            
State Consumer Investigations [Member] | Settled Litigation [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Number of states where settlement agreements were entered into       46siri_LossContingencySettlementAgreementsNumberOfStates
/ us-gaap_LitigationCaseAxis
= siri_StateConsumerInvestigationsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
     
Damages awarded       4,000,000us-gaap_LossContingencyDamagesAwardedValue
/ us-gaap_LitigationCaseAxis
= siri_StateConsumerInvestigationsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_SettledLitigationMember
     
Pre-1972 Recording Matters [Member] | Pending Litigation [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Number of pending claims         1us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LitigationCaseAxis
= siri_PreNineteenSeventyTwoRecordingMattersMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
3us-gaap_LossContingencyPendingClaimsNumber
/ us-gaap_LitigationCaseAxis
= siri_PreNineteenSeventyTwoRecordingMattersMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
 
Compensatory damages sought         100,000,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= siri_PreNineteenSeventyTwoRecordingMattersMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
   
SoundExchange, Inc. [Member] | Pending Litigation [Member] | Minimum [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Compensatory damages sought           50,000,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= siri_SoundExchangeInc.Member
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
SoundExchange, Inc. [Member] | Pending Litigation [Member] | Maximum [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Compensatory damages sought           100,000,000us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LitigationCaseAxis
= siri_SoundExchangeInc.Member
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Telephone Consumer Protection Act Suits [Member] | Pending Litigation [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Number of class action suits             3siri_LossContingencyNumberOfClassActionSuits
/ us-gaap_LitigationCaseAxis
= siri_TelephoneConsumerProtectionActSuitsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
Statutory damages sought per violation             500siri_LossContingencyDamagesSoughtValuePerViolation
/ us-gaap_LitigationCaseAxis
= siri_TelephoneConsumerProtectionActSuitsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
Telephone Consumer Protection Act Suits [Member] | Pending Litigation [Member] | Maximum [Member]              
Commitments and Contingencies (Textual) [Abstract]              
Treble damages sought per willful violation             $ 1,500siri_LossContingencyDamagesSoughtValuePerWillfulViolation
/ us-gaap_LitigationCaseAxis
= siri_TelephoneConsumerProtectionActSuitsMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember