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Benefit Plans - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 1 Months Ended | ||
|---|---|---|---|---|
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Mar. 31, 2015
plan
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Mar. 31, 2014
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May 31, 2009
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Dec. 31, 2014
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based payment expense | $ 19,417us-gaap_ShareBasedCompensation | $ 18,240us-gaap_ShareBasedCompensation | ||
| Number of other share-based benefit plans | 3siri_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfShareBasedBenefitPlans | |||
| Sirius XM Savings Plan [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Minimum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan |
1.00%siri_DefinedContributionPlanEmployeesContributionOfTheirPretaxEarningsToSubsidiaryPlanMinimum / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Maximum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan |
50.00%siri_DefinedContributionPlanEmployeesContributionofTheirPretaxEarningstoSubsidiaryPlanMaximum / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Percent of Company match of employee's voluntary contributions |
50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Percent of employee's pre-tax salary |
6.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Maximum annual contributions per employee, percent |
3.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Vesting percentage of employer contributions for each year of employment |
33.33%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Savings plan, fully vested period | 3 years | |||
| Contributions by employer |
3,027us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
1,879us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount / us-gaap_DefinedContributionPlanNameAxis = siri_SiriusXmPlanMember |
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| Employee Stock Option [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based payment expense |
16,691us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
16,615us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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| Granted, options (in shares) |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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| Weighted average grant date fair value of options granted (in dollars per share) |
$ 1.08us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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| Total intrinsic value of stock options exercised |
30,952us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
11,528us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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| Number of shares issued as a result of stock option exercises |
4,837,000us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
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| Third Parties [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Granted, options (in shares) |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = siri_ThirdPartiesMember |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = siri_ThirdPartiesMember |
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| Restricted Stock Units (RSUs) [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Share-based payment expense |
2,726us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
1,625us-gaap_ShareBasedCompensation / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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| Weighted average grant date fair value of restricted stock units granted |
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
$ 3.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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| Restricted stock units vested |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
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| Restricted Stock Units RSU and Stock Options [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Total unrecognized compensation costs related to unvested share based payment awards for restricted stock units, net of estimated forfeitures |
$ 142,748us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = siri_RestrictedStockUnitsRsuAndStockOptionsMember |
$ 162,985us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = siri_RestrictedStockUnitsRsuAndStockOptionsMember |
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| Weighted average expected period for recognition of compensation expenses | 2 years 6 months | |||
| 2009 Long-Term Stock Incentive Plan [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Restricted stock conversion to common stock |
1siri_CommonStockRestrictedStockConversionToCommonStock / us-gaap_PlanNameAxis = siri_TwoThousandNineLongTermStockIncentivePlanMember |
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| Common stock available for future grants |
21,668,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = siri_TwoThousandNineLongTermStockIncentivePlanMember |
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| 2009 Long-Term Stock Incentive Plan [Member] | Employee Stock Option [Member] | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Stock options expiration term | 10 years | |||
| X | ||||||||||
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- Definition
Common stock, restricted stock conversion to common stock. No definition available.
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| X | ||||||||||
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- Definition
Employees contribution of their pretax earnings to subsidiary plan maximum. No definition available.
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| X | ||||||||||
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- Definition
Employees contribution of their pretax earnings to subsidiary plan minimum. No definition available.
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| X | ||||||||||
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- Definition
Defined contribution plan, fully vested period. No definition available.
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| X | ||||||||||
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- Definition
Share-based compensation arrangement by share-based payment award, number of share-based benefit plans. No definition available.
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| X | ||||||||||
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- Definition
Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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| X | ||||||||||
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- Definition
Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
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| X | ||||||||||
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- Definition
Percentage employer matches of the employee's percentage contribution matched. No definition available.
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| X | ||||||||||
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- Definition
Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. No definition available.
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| X | ||||||||||
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- Definition
Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. No definition available.
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| X | ||||||||||
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- Definition
Unrecognized cost of unvested share-based compensation awards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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