Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Retirement Benefits [Abstract] | |||||
| Contributions to the DCP, net of withdrawals | $ (1) | $ (1) | $ (4) | ||
| Contributions to the DCP | $ 1 | ||||
| Fair value of investment assets related to deferred compensation plan | 59 | 59 | $ 60 | ||
| Gains (losses) on investments | $ 5 | $ 1 | $ 3 | $ 5 | |
| X | ||||||||||
- Definition Deferred Compensation Arrangement with Individual, Contributions by Employer, Net Of Withdrawals No definition available.
|
| X | ||||||||||
- Definition Deferred Compensation Arrangement with Individual, Gain (Loss) on Investment No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. No definition available.
|
| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|