| Business & Basis of Presentation (Details) subscriber in Millions, $ in Millions | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2023  USD ($)  segment  subscriber  satellite_radio_system | Dec. 31, 2022  USD ($) | Dec. 31, 2021  USD ($) | |
| Related Party Transaction [Line Items] | |||
| Number of reportable segments | segment | 2 | ||
| Number of satellite radio systems | satellite_radio_system | 2 | ||
| Revolving credit facility borrowings | $ | $ 1,670 | $ 2,300 | $ 1,177 | 
| Revolving credit facility repayments | $ | $ 1,750 | $ 2,220 | $ 1,830 | 
| Pandora | |||
| Related Party Transaction [Line Items] | |||
| Number of subscribers | subscriber | 6.0 | ||
| Sirius XM Canada | Equity Method Investee | |||
| Related Party Transaction [Line Items] | |||
| Equity method investment, equity interest percentage | 70.00% | ||
| Equity method investment, voting interest percentage | 33.00% | ||
| Liberty Media | Management | Common Stock | |||
| Related Party Transaction [Line Items] | |||
| Related party ownership percentage | 83.40% | ||
| Sirius XM | |||
| Related Party Transaction [Line Items] | |||
| Number of subscribers | subscriber | 33.9 | ||
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