Benefit Plans - Sirius XM Holdings Inc. Deferred Compensation Plan (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Dec. 31, 2023 |
|
| Retirement Benefits [Abstract] | |||||
| Net withdrawals | $ (2) | $ (1) | $ (1) | ||
| Net contributions | $ 1 | ||||
| Fair value of investment assets related to deferred compensation plan | 59 | 59 | $ 53 | ||
| Gains (losses) on investments | $ 2 | $ (1) | $ 7 | $ 4 | |
| 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
|