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Commitments and Contingencies - Other Contingencies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2021
Loss Contingencies [Line Items] |  |
Maximum liability, guarantees | $ 3,100 | $ 3,400
Takata Passenger-side Airbags |  |
Loss Contingencies [Line Items] |  |
Increase in product warranty accrual | 1,100 |
Accrued Liabilities, Current and Other Liabilities, Noncurrent |  |
Loss Contingencies [Line Items] |  |
Product liability | $ 589 | $ 620

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