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Business & Basis of Presentation - Additional Information 2 (Details) (Common Stock [Member], Liberty Media [Member], Minimum [Member])
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Mar. 31, 2015
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Common Stock [Member] | Liberty Media [Member] | Minimum [Member]
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| Related Party Transaction [Line Items] | |
| Related party ownership percentage |
50.00%siri_RelatedPartyTransactionRelatedPartyOwnershipPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = siri_LibertyMediaMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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- Definition
Related party transaction related party ownership percentage. No definition available.
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- Details
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