Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Details)

v2.4.1.9
Debt - Additional Information (Details) (Senior Secured Revolving Credit Facility [Member])
3 Months Ended
Mar. 31, 2015
Senior Secured Revolving Credit Facility [Member]
 
Debt Instrument [Line Items]  
Maximum consolidated leverage 500.00%siri_DebtInstrumentCovenantTermsMaximumConsolidatedLeverageRatio
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember