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Business & Basis of Presentation (Details) subscriber in Millions, $ in Millions | 12 Months Ended
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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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