Commitments and Contingencies - Other Contingencies (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Mar. 31, 2021 |
|
| Loss Contingencies [Line Items] | ||
| Maximum liability, guarantees | $ 3,100 | $ 3,200 |
| 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 | $ 588 |