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Supplemental Financial Statement Information - Other Income (Expenses), Net (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 19, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Interest income |  | $ 13 | $ 6 |  | $ 18 | $ 44
Foreign currency exchange gains (losses), net |  | 0 | (29) |  | (25) | (57)
Gain (Loss) on business divestitures, net |  | 0 | (27) |  | 1,684 | 127
Unrealized gain on investments |  | 1,912 | (2) |  | 1,975 | (116)
Impairment of debt and equity securities |  | 0 | 13 |  | 0 | (1,850)
Other, net |  | 18 | (5) |  | 1 | 13
Other income (expense), net |  | 1,943 | $ (44) |  | 3,653 | $ (1,839)
Credit losses on securities for which credit losses were not previously recorded |  |  |  | $ (173) |  |
Aurora |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Unrealized gain on investments |  | 471 |  |  |  |
Didi |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Unrealized gain on investments |  | $ 1,400 |  |  | 1,400 |
Uber Eats India | Not Discontinued Operations |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain (Loss) on business divestitures, net |  |  |  |  | 154 |
Apparate | Not Discontinued Operations |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Gain (Loss) on business divestitures, net | $ 1,644 |  |  |  | $ 1,600 |

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