Employees contribution of their pretax earnings to subsidiary plan maximum.

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Employees contribution of their pretax earnings to subsidiary plan minimum.

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Defined contribution plan, fully vested period.

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Restricted stock conversion to common stock.

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Share-based compensation arrangement by share-based payment award, number of share-based benefit plans.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Incremental Grants in Period

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Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

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The amount of the cost recognized during the period for defined contribution plans.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Percentage employer matches of the employee's percentage contribution matched.

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Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Unrecognized cost of unvested share-based compensation awards.

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-Paragraph 2
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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.

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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.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of grants made 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).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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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.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The number of shares or units of entity securities issued in the transaction in which equity securities were issued to pay for goods or nonemployee services.

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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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.

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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.

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Benefit Plans - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	May 31, 2015	Dec. 31, 2016 USD ($) plan $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense		$ 108,604	$ 84,310	$ 78,212
Number of other share-based benefit plans \| plan		4
Options granted (in shares) \| shares		0		0
Fair value of investment assets related to deferred compensation plan		$ 4,854
Sirius XM Savings Plan
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%
Maximum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan		50.00%
Percent of Company match of employee's voluntary contributions		50.00%
Percent of employee's pre-tax salary		6.00%
Maximum annual contributions per employee, percent		3.00%
Vesting percentage of employer contributions for each year of employment		33.33%
Savings plan, fully vested period		3 years
Recognized cost		$ 7,104	8,144	$ 5,385
Performance-based Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense		$ 1,859
Award vesting period		3 years
Shares granted (in shares) \| shares		3,036,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental shares granted (in shares) \| shares		70,000
Employees And Non Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense		$ 80,266	$ 70,084	$ 69,754
Weighted average grant date fair value of options granted (in dollars per share) \| $ / shares		$ 0.81	$ 1.11	$ 1.05
Total intrinsic value of stock options exercised		$ 81,204	$ 117,944	$ 89,428
Number of net settled shares issued as a result of exercise of stock options and vesting of restricted stock units (in shares) \| shares		10,918,000	17,652,000	15,228,000
Restricted Stock Units RSU and Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense		$ 28,338	$ 14,226	$ 8,458
Number of net settled shares issued as a result of exercise of stock options and vesting of restricted stock units (in shares) \| shares		2,493,000	2,088,000	732,000
Total intrinsic value of restricted stock units and stock awards vested		$ 17,807	$ 13,720	$ 4,044
Shares granted (in shares) \| shares		18,523,000	8,961,000	6,108,000
Restricted Stock Units RSU and Stock Options
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		$ 266,045	$ 261,628
Weighted average expected period for recognition of compensation expenses		2 years 6 months
2015 Long Term Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock conversion to common stock	1
Common stock available for future grants (in shares) \| shares		181,148,000
2015 Long Term Stock Incentive Plan \| Employees And Non Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option expiration period	10 years
2015 Long Term Stock Incentive Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
2015 Long Term Stock Incentive Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years