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Equity Method Investments - Narrative (Details) $ in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Extension period (in days) | 30 days |  |  |  |  |  |
Additional conditional sale of equity method investment (percentage) | 0.067 |  |  |  |  |  |
Proceeds from sale of equity method investments and grant of related call option |  |  |  |  | $ 800 | $ 0 |
Call option period (in years) | 2 years |  |  |  |  |  |
MLU B.V. Call Option |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Allocated consideration of call option |  |  | $ 230 |  | 230 |  | $ 0
Yandex Self Driving Group B.V. and MLU B.V. |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Proceeds from sale of equity method investments and grant of related call option |  |  | 800 |  |  |  |
Liabilities recognized |  |  | $ 212 |  | $ 212 |  |
Yandex Self Driving Group B.V. and MLU B.V. | Forecast |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Proceeds from sale of equity method investments and grant of related call option |  | $ 200 |  | $ 1,000 |  |  |
MLU B.V. |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage sold |  |  | 0.045 |  |  |  |
Proceeds from sale of equity method investments and grant of related call option |  |  | $ 276 |  |  |  |
Realized gain on disposal |  |  | $ 106 |  |  |  |
Equity ownership interest |  |  | 29.00% |  | 29.00% |  |
Derivative liability, exercise price | $ 2,000 |  |  |  |  |  |
Weighted average remaining useful life (in years) |  |  |  |  | 3 years 4 months 24 days |  |
MLU B.V. | MLU B.V. Call Option |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Allocated consideration of call option |  |  | $ 230 |  | $ 230 |  |

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