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Investments - Equity Method Investment in Adevinta (Details) shares in Millions, $ in Millions |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 18, 2021 USD ($) shares | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Jun. 24, 2021 USD ($)
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Unrealized loss on equity securities |  | $ 77 |  | $ 259 |  |  |
Equity investment in Adevinta |  | 2,919 |  | $ 2,919 |  | $ 5,391 |
Adevinta |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage | 25.00% |  |  |  |  |  | 44.00%
Equity investment under fair value option |  |  |  |  |  |  | $ 10,800
Ownership percentage after sale |  |  |  | 33.00% |  |  |
Voting rights, conversion ratio |  |  |  |  |  |  | 1
Unrealized loss on equity securities |  | 829 | $ 422 | $ 2,472 | $ 422 |  |
Equity investment in Adevinta |  | $ 2,919 |  | $ 2,919 |  | $ 5,391 |
Adevinta | Maximum |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Limitation on voting interest that can be held (as a percent) |  |  |  |  |  |  | 33.00%
Adevinta | Permira |  |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |  |
Number of voting shares sold | shares | 135 |  |  |  |  |  |
Total consideration from sale of equity securities | $ 2,300 |  |  |  |  |  |

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