| Goodwill - Narrative (Details) | 12 Months Ended | ||||
|---|---|---|---|---|---|
| Dec. 31, 2023  USD ($)  reporting_unit | Dec. 31, 2022  USD ($) | Dec. 31, 2021  USD ($) | Dec. 31, 2020  USD ($) | Dec. 31, 2008  USD ($) | |
| Business Acquisition [Line Items] | |||||
| Number of reporting units | reporting_unit | 2 | ||||
| Goodwill | $ 3,249,000,000 | $ 3,249,000,000 | $ 3,151,000,000 | ||
| Goodwill, impairment loss | 0 | 0 | 0 | ||
| Accumulated impairment of goodwill since the merger | 5,722,000,000 | ||||
| Sirius XM | |||||
| Business Acquisition [Line Items] | |||||
| Goodwill | 2,290,000,000 | 2,290,000,000 | 2,290,000,000 | ||
| Accumulated impairment of goodwill since the merger | $ 4,766,000,000 | ||||
| Pandora and Off-platform | |||||
| Business Acquisition [Line Items] | |||||
| Goodwill | $ 959,000,000 | $ 959,000,000 | $ 861,000,000 | ||
| Accumulated impairment of goodwill since the merger | $ 956,000,000 | ||||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. No definition available. 
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- Details 
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- Details 
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