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Long-Term Debt (Narrative) (Details) (USD $)
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3 Months Ended | 11 Months Ended | |||||||||||||||
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Mar. 31, 2013
Sirius XM credit facility [Member]
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Mar. 31, 2013
Starz Bank Facility [Member]
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Dec. 31, 2012
Starz Bank Facility [Member]
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Mar. 31, 2013
Sirius XM 8.75% Senior Notes due 2015 [Member]
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Jan. 18, 2013
Sirius XM 8.75% Senior Notes due 2015 [Member]
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Mar. 31, 2013
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Jan. 18, 2013
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Mar. 31, 2013
Sirius XM 7.625% Senior Notes due 2018 [Member]
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Jan. 18, 2013
Sirius XM 7.625% Senior Notes due 2018 [Member]
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Mar. 31, 2013
Sirius XM 5.25% Senior Notes due 2022 [Member]
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Jun. 30, 2013
Sirius XM Senior Notes due 2020 [Member]
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Jun. 30, 2013
Sirius XM Senior Notes due 2023 [Member]
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Jun. 30, 2013
Sirius XM Senior Notes due 2020 ans 2023 [Member]
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Mar. 31, 2013
SIRIUS XM [Member]
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Jun. 30, 2012
SIRIUS XM [Member]
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Dec. 31, 2013
SIRIUS XM [Member]
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Sep. 30, 2012
SIRIUS XM [Member]
Sirius XM 7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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| Senior Notes, principal amount | Ìý | Ìý | Ìý | $ 800,000,000 | Ìý | $ 550,000,000 | Ìý | $ 700,000,000 | Ìý | $ 400,000,000 | $ 500,000,000 | $ 500,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Debt Instrument, Interest Rate, Stated Percentage | 0.30% | Ìý | Ìý | 8.75% | Ìý | 0.00% | Ìý | 0.00% | Ìý | 5.25% | 4.25% | 0.00% | Ìý | Ìý | Ìý | Ìý | Ìý |
| Debt Instrument, Convertible, Conversion Ratio | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 533.3333 | 543.1372 | Ìý |
| Debt Conversion, Converted Instrument, Amount | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 48,000,000 | Ìý | Ìý | Ìý |
| Debt Conversion, Converted Instrument, Shares Issued | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 28,000,000 | Ìý | Ìý | Ìý |
| Debt instrument, face amount per debenture | Ìý | Ìý | Ìý | Ìý | Ìý | 1,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| conversion price for exchangeable debt | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 1.875 |
| Senior Notes, principal amount owned by Â鶹×îгöÆ· | Ìý | Ìý | Ìý | Ìý | 150,000,000 | Ìý | 11,000,000 | Ìý | 50,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Debt Conversion, Converted Instrument, Rate | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 581.3112 | Ìý | Ìý | Ìý |
| Line of Credit Facility, Maximum Borrowing Capacity | Ìý | Ìý | 1,250,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Line of Credit Facility, Remaining Borrowing Capacity | Ìý | 1,250,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Long-term Debt, Fair Value | Ìý | Ìý | Ìý | 724,000,000 | Ìý | 870,000,000 | Ìý | 719,000,000 | Ìý | 409,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Senior Notes | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 1,000,000,000 | Ìý | Ìý | Ìý | Ìý |