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Goodwill (Details) | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) reporting_unit | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 12, 2022 USD ($) | Dec. 31, 2021 USD ($) | Apr. 23, 2021 USD ($) | Dec. 31, 2008 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Number of reporting units | reporting_unit | 2 |  |  |  |  |  |
Goodwill | $ 3,180,000,000 |  |  |  | $ 3,151,000,000 |  |
Goodwill, impairment loss | 0 | $ 0 |  |  |  |  |
Accumulated impairment of goodwill since the merger | 5,722,000,000 |  |  |  |  |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | $ 29,000,000 |  | $ 23,000,000 |
Sirius XM |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill | 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 | 890,000,000 |  |  |  | $ 861,000,000 |  |
Goodwill, impairment loss |  |  | $ 956,000,000 |  |  |  |
Goodwill acquired | $ 29,000,000 |  |  |  |  |  |

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