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Business & Basis of Presentation (Details) subscriber in Millions, $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2024 USD ($) satelliteRadioSystem subscriber segment | Jun. 30, 2023 USD ($)
Related Party Transaction [Line Items] |  |
Number of reportable segments | segment | 2 |
Number of satellite radio systems | satelliteRadioSystem | 2 |
Revolving credit facility borrowings | $ | $ 1,352 | $ 1,117
Revolving credit facility repayments | $ | $ 1,002 | $ 974
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 | 83.30% |
Sirius XM |  |
Related Party Transaction [Line Items] |  |
Number of subscribers | subscriber | 33.3 |

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