Quarterly report pursuant to Section 13 or 15(d)

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

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Debt - Schedule of Long-term Debt Instruments (Parenthetical) (Details) - USD ($)
 1 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2015
Dec. 31, 2014
Jun. 30, 2015
Mar. 31, 2015
Senior Secured Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Debt instrument, term 5 years        
Credit facility, maximum borrowing capacity $ 1,250,000,000 $ 1,750,000,000 [1]   $ 1,750,000,000  
Debt Instrument, Maturity Date [1]   Jun. 16, 2020      
Credit facility, unused capacity, commitment fee percentage   0.30%      
Credit facility, remaining borrowing capacity   $ 1,460,000,000      
Senior Notes [Member] | 5.375% Senior Notes Due 2025 [Member]          
Debt Instrument [Line Items]          
Principal Amount   $ 1,000,000,000 [2],[3]     $ 1,000,000,000
Interest rate on instrument   5.375% [2],[3]     5.375%
Unamortized discount         $ 11,250,000
Debt Instrument, Maturity Date [2],[3]   Apr. 15, 2025      
Senior Secured Notes [Member] | 5.25% Senior Notes Due 2022 [Member]          
Debt Instrument [Line Items]          
Principal Amount [3],[4]   $ 400,000,000 $ 400,000,000    
Interest rate on instrument [3],[4]   5.25% 5.25%    
Debt Instrument, Maturity Date [3],[4]   Aug. 15, 2022 Aug. 15, 2022    
[1] In December 2012, Sirius XM entered into a five-year Credit Facility with a syndicate of financial institutions for $1,250,000. In June 2015, Sirius XM entered into an amendment to increase the total borrowing capacity under the Credit Facility to $1,750,000 and to extend the maturity to June 2020. 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. 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 September 30, 2015. As of September 30, 2015, $1,460,000 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] 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.
[3] Substantially all of our domestic wholly-owned subsidiaries have guaranteed these notes.
[4] The liens securing the 5.25% Notes are equal and ratable to the liens granted to secure the Credit Facility.