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Commitments and Contingencies - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 31, 2021 defect	Jun. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Maximum liability, guarantees			$ 3,600		$ 3,100
Accrued Liabilities, Current and Other Liabilities, Noncurrent
Loss Contingencies [Line Items]
Estimated litigation liability			1,100		1,400
Product liability			573		$ 587
Indirect Tax Matters
Loss Contingencies [Line Items]
Estimate of possible loss			1,000
Chevrolet Bolt EV Recall
Loss Contingencies [Line Items]
Probable loss accrual	$ 1,200						$ 812
Number of manufacturing defects | defect						2
Chevrolet Bolt EV Recall | LG
Loss Contingencies [Line Items]
Amount awarded to other party	$ 1,900
Patent Royalty Matters
Loss Contingencies [Line Items]
Probable loss accrual				$ 200
Korea Wage Litigation - Former Subcontract Workers
Loss Contingencies [Line Items]
Probable loss accrual			237
Estimate of possible loss			$ 86
Takata Passenger-side Airbags
Loss Contingencies [Line Items]
Increase in product warranty accrual		$ 1,100

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