v3.22.4
Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2022
Jan. 17, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-34960    
Entity Registrant Name GENERAL MOTORS COMPANY    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 27-0756180    
Entity Address, Address Line One 300 Renaissance Center,    
Entity Address, City or Town Detroit,    
Entity Address, State or Province MI    
Entity Address, Postal Zip Code 48265    
City Area Code 313    
Local Phone Number 667-1500    
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol GM    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 46.2
Entity Common Stock, Shares Outstanding   1,394,637,226  
Documents Incorporated by Reference Portions of the registrant's definitive Proxy Statement related to the Annual Stockholders Meeting to be filed subsequently are incorporated by reference into Part III of this Form 10-K.    
Entity Central Index Key 0001467858    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false