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Commitments and Contingencies (Details) $ in Millions |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 16, 2021 driver | Feb. 07, 2020 USD ($) | Mar. 26, 2019 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency accrual |  |  |  | $ 2,300 | $ 1,800
Non-income tax, current |  |  |  | $ 1,300 | $ 1,300
UNITED KINGDOM |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of drivers treated as workers (more than) | driver | 70,000 |  |  |  |
HMRC |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Value-added-tax percentage |  |  |  | 20.00% |
Google v. Levandowski |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Settlement amount awarded to other party |  | $ 10 | $ 127 |  |
Estimated settlement cost |  |  |  | $ 60 |
Joint and Several Liability |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Settlement amount awarded to other party |  |  | $ 1 |  |

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