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Cover
Sep. 03, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 03, 2020
Entity File Number 001-34960
Entity Registrant Name GENERAL MOTORS COMPANY
Entity Central Index Key 0001467858
Entity Tax Identification Number 27-0756180
Entity Incorporation, State or Country Code DE
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 48265-3000
City Area Code (313)
Local Phone Number 667-1500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value
Trading Symbol GM
Security Exchange Name NYSE
Entity Emerging Growth Company false