Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Repurchase Agreements (Details)

v2.4.1.9
Stockholders' Equity - Schedule of Repurchase Agreements (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) 143,717siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram 39,500siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
Common stock repurchased, value $ 534,040siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram $ 128,682siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
Common Stock [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) 0siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		 
Common stock repurchased, value 0siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		 
Common Stock [Member] | Open Market And Privately Negotiated Repurchases [Member]    
Equity, Class of Treasury Stock [Line Items]    
Common stock repurchased (in shares) 143,717siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_ShareRepurchaseProgramAxis
= siri_OpenMarketAndPrivatelyNegotiatedMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		[1] 39,500siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_ShareRepurchaseProgramAxis
= siri_OpenMarketAndPrivatelyNegotiatedMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		[1]
Common stock repurchased, value $ 534,040siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_ShareRepurchaseProgramAxis
= siri_OpenMarketAndPrivatelyNegotiatedMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		[1] $ 128,682siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
/ us-gaap_ShareRepurchaseProgramAxis
= siri_OpenMarketAndPrivatelyNegotiatedMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember 		[1]
[1] As of March 31, 2015, $24,858 of common stock repurchases had not settled, nor been retired, and were recorded as Treasury stock within our unaudited consolidated balance sheets and unaudited consolidated statements of stockholders' equity.