Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Debt (Details)

v2.4.0.8
Fair Value of Debt (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Sirius XM 8.75% Senior Notes due 2015 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value $ 685
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value 930
Sirius XM 7.625% Senior Notes due 2018 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value 601
Sirius XM 5.25% Senior Notes due 2022 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value 391
Sirius XM Senior Notes due 2020 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value 474
Sirius XM Senior Notes due 2023 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt, Fair Value $ 470