Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified
|
12 Months Ended |
Dec. 31, 2014
|
Dec. 31, 2013
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Stock repurchased and retired during period, value |
$ 2,472,645siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
|
|
$ 1,764,969siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram
|
|
Common Stock [Member] |
|
|
|
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Number of shares repurchases and retired |
739,016,632siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
|
520,257,866siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
|
Stock repurchased and retired during period, value |
2,522,832siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
|
1,762,360siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
|
Common Stock [Member] | Open Market And Privately Negotiated Repurchases [Member] |
|
|
|
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Number of shares repurchases and retired |
422,965,443siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_OpenMarketAndPrivatelyNegotiatedMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[1] |
476,545,601siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_OpenMarketAndPrivatelyNegotiatedMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[1] |
Stock repurchased and retired during period, value |
1,426,428siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_OpenMarketAndPrivatelyNegotiatedMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[1] |
1,602,360siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_OpenMarketAndPrivatelyNegotiatedMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[1] |
Common Stock [Member] | May ASR Agreement [Member] |
|
|
|
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Number of shares repurchases and retired |
151,846,125siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[2] |
0siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[2] |
Stock repurchased and retired during period, value |
506,404siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[2] |
0siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_MayTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[2] |
Common Stock [Member] | August ASR Agreement [Member] |
|
|
|
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Number of shares repurchases and retired |
71,316,503siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[3] |
0siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[3] |
Stock repurchased and retired during period, value |
250,000siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[3] |
0siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_ShareRepurchaseProgramAxis = siri_AugustTwoThousandFourteenAcceleratedShareRepurchaseAgreementMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[3] |
Liberty Media [Member] | Common Stock [Member] | Amended October 2013 Share Repurchase Program [Member] |
|
|
|
|
Equity, Class of Treasury Stock [Line Items] |
|
|
|
|
Number of shares repurchases and retired |
92,888,561siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = siri_LibertyMediaMember / us-gaap_ShareRepurchaseProgramAxis = siri_AmendedOctober2013ShareRepurchaseProgramMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[4] |
43,712,265siri_TreasuryStockSharesAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = siri_LibertyMediaMember / us-gaap_ShareRepurchaseProgramAxis = siri_AmendedOctober2013ShareRepurchaseProgramMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[4] |
Stock repurchased and retired during period, value |
$ 340,000siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = siri_LibertyMediaMember / us-gaap_ShareRepurchaseProgramAxis = siri_AmendedOctober2013ShareRepurchaseProgramMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[4] |
$ 160,000siri_TreasuryStockValueAcquiredCostMethodIncludingAcceleratedStockRepurchaseProgram / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = siri_LibertyMediaMember / us-gaap_ShareRepurchaseProgramAxis = siri_AmendedOctober2013ShareRepurchaseProgramMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
|
[4] |
|
|