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Commitments and Contingencies - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) numberOfLitigationCase	Jul. 31, 2021 defect	Jun. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Maximum liability, guarantees	$ 3,100		$ 3,100
Rebates available	1,200		1,300
Brazil | Foreign Tax Authority
Loss Contingencies [Line Items]
Number of claims settled | numberOfLitigationCase				3
Estimated potential recovery from taxing authority				$ 1,400
Indirect Tax Matters
Loss Contingencies [Line Items]
Reasonably possible loss	900
Indirect Tax Matters | Brazil
Loss Contingencies [Line Items]
Increase in accrual during period	194
Chevrolet Bolt EV Recall
Loss Contingencies [Line Items]
Loss accrual		$ 1,200				$ 812
Number of manufacturing defect | defect					2
Chevrolet Bolt EV Recall | LG Electronics, Inc.
Loss Contingencies [Line Items]
Amount awarded to other party		$ 1,900
Patent Royalty Matters
Loss Contingencies [Line Items]
Loss accrual	300
Increase in accrual during period	290
Accrued liabilities and Other liabilities
Loss Contingencies [Line Items]
Litigation-related liability and tax administrative matters	1,400		1,200
Product liability	587		589
Credit card program deferred revenue	309		252
Takata Passenger-side Airbags
Loss Contingencies [Line Items]
Increase in product warranty accrual			$ 1,100
Korea Wage Litigation - Former Subcontract Workers
Loss Contingencies [Line Items]
Loss accrual	281
Reasonably possible loss	$ 111

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