Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details)

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Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2013
Sirius XM 5.875% Senior Notes due 2020 [Member]
Dec. 31, 2013
Sirius XM 5.75% Senior Notes due 2021 [Member]
Dec. 31, 2013
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
Dec. 31, 2013
Sirius XM 5.25% Senior Notes due 2022 [Member]
Dec. 31, 2013
Sirius XM Senior Notes due 2020 [Member]
Dec. 31, 2013
Sirius XM Senior Notes due 2023 [Member]
SIRIUS XM 5.875% Senior Notes due 2020 $ 0 $ 667 $ 608 $ 961 $ 407 $ 474 $ 451