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Goodwill (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) reporting_unit | Sep. 30, 2019 USD ($) | Jun. 16, 2020 USD ($) | Dec. 31, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Number of reporting units | reporting_unit |  |  | 2 |  |  |
Goodwill | $ 3,860,000,000 |  | $ 3,860,000,000 |  |  | $ 3,843,000,000
Impairment losses for goodwill | 0 | $ 0 | 0 | $ 0 |  |
Accumulated impairment of goodwill since the merger | 4,766,000,000 |  | 4,766,000,000 |  |  |
Simplecast |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 17,000,000 |
Sirius XM |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | 2,290,000,000 |  | 2,290,000,000 |  |  | 2,290,000,000
Pandora |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 1,570,000,000 |  | 1,570,000,000 |  |  | $ 1,553,000,000
Pandora | Simplecast |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Additional goodwill |  |  | $ 17,000,000 |  |  |

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