Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Construction in Progress (Details)

v2.4.1.9
Property and Equipment - Schedule of Construction in Progress (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Property Plant And Equipment [Line Items]    
Construction in progress $ 147,768us-gaap_ConstructionInProgressGross $ 155,716us-gaap_ConstructionInProgressGross
Satellite system [Member]    
Property Plant And Equipment [Line Items]    
Construction in progress 12,912us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_SatelliteSystemMember 		12,912us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_SatelliteSystemMember
Terrestrial repeater network [Member]    
Property Plant And Equipment [Line Items]    
Construction in progress 44,733us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_TerrestrialRepeaterNetworkMember 		48,406us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_TerrestrialRepeaterNetworkMember
Capitalized software [Member]    
Property Plant And Equipment [Line Items]    
Construction in progress 73,719us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareAndSoftwareDevelopmentCostsMember 		77,755us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Other [Member]    
Property Plant And Equipment [Line Items]    
Construction in progress $ 16,404us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_ConstructionInProgressOtherMember 		$ 16,643us-gaap_ConstructionInProgressGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= siri_ConstructionInProgressOtherMember