Benefit Plans - 401(k) Savings Plan (Details) - Sirius XM Savings Plan - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Defined Benefit Plan Disclosure [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 | $ 2 | $ 2 |
| X | ||||||||||
- Definition Employees contribution of their pretax earnings to subsidiary plan maximum. No definition available.
|
| X | ||||||||||
- Definition Employees contribution of their pretax earnings to subsidiary plan minimum. No definition available.
|
| X | ||||||||||
- Definition Defined contribution plan, fully vested period. No definition available.
|
| X | ||||||||||
- Definition 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. No definition available.
|
| X | ||||||||||
- Definition Amount of cost for defined contribution plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
|
| X | ||||||||||
- Definition Percentage employer matches of the employee's percentage contribution matched. No definition available.
|
| X | ||||||||||
- Definition Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. No definition available.
|
| X | ||||||||||
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. No definition available.
|
| X | ||||||||||
- Details
|