Quarterly report pursuant to Section 13 or 15(d)

Debt - Schedule of Long-term Debt Instruments (Parenthetical) (Details)

v2.4.1.9
Debt - Schedule of Long-term Debt Instruments (Parenthetical) (Details) (USD $)
 1 Months Ended 3 Months Ended
Dec. 31, 2012
Mar. 31, 2015
Dec. 31, 2014
Senior Secured Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Debt instrument, term 5 years    
Credit facility, maximum borrowing capacity $ 1,250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember 		$ 1,250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember 		[1] $ 1,250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember 		[1]
Credit facility, unused capacity, commitment fee percentage   0.30%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember 		 
Credit facility, remaining borrowing capacity   1,250,000,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember 		 
5.375% Senior Notes Due 2025 [Member]      
Debt Instrument [Line Items]      
Principal Amount   1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointThreeSevenFivePercentSeniorNoteDueAprilFifteenTwoThousandTwentyFiveMember 		[2],[3] 1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointThreeSevenFivePercentSeniorNoteDueAprilFifteenTwoThousandTwentyFiveMember 		[2],[3]
Interest rate on instrument   5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointThreeSevenFivePercentSeniorNoteDueAprilFifteenTwoThousandTwentyFiveMember 		[2],[3] 5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointThreeSevenFivePercentSeniorNoteDueAprilFifteenTwoThousandTwentyFiveMember 		[2],[3]
Unamortized discount   11,250,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointThreeSevenFivePercentSeniorNoteDueAprilFifteenTwoThousandTwentyFiveMember 		 
5.25% Senior Notes due 2022 [Member]      
Debt Instrument [Line Items]      
Principal Amount   $ 400,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointTwoFivePercentSeniorNotesDueTwoThousandTwentyMember 		[2],[4] $ 400,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointTwoFivePercentSeniorNotesDueTwoThousandTwentyMember 		[2],[4]
Interest rate on instrument   5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointTwoFivePercentSeniorNotesDueTwoThousandTwentyMember 		[2],[4] 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= siri_FivePointTwoFivePercentSeniorNotesDueTwoThousandTwentyMember 		[2],[4]
[1] In December 2012, Sirius XM entered into a five-year Credit Facility with a syndicate of financial institutions for $1,250,000. Sirius XM's obligations under the Credit Facility are guaranteed by certain of its material domestic subsidiaries and are secured by a lien on substantially all of Sirius XM's assets and the assets of its material domestic subsidiaries. Borrowings under the Credit Facility are used for working capital and other general corporate purposes, including dividends, financing of acquisitions and share repurchases. Interest on borrowings is payable on a monthly basis and accrues at a rate based on LIBOR plus an applicable rate. Sirius XM is also required to pay a variable fee on the average daily unused portion of the Credit Facility which is payable on a quarterly basis. The variable rate for the unused portion of the Credit Facility was 0.30% per annum as of March 31, 2015. As of March 31, 2015, $1,250,000 was available for future borrowing under the Credit Facility. Sirius XM's outstanding borrowings under the Credit Facility are classified as Long-term debt within our unaudited consolidated balance sheets due to the long-term maturity of this debt.
[2] Substantially all of our domestic wholly-owned subsidiaries have guaranteed these notes.
[3] In March 2015, Sirius XM issued $1,000,000 aggregate principal amount of 5.375% Senior Notes due 2025, with an original issuance discount of $11,250.
[4] The liens securing the 5.25% Notes are equal and ratable to the liens granted to secure the Credit Facility.