| Cover | Jul. 23, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jul. 23, 2024 |
| Entity Registrant Name | GENERAL MOTORS COMPANY |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-34960 |
| 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 |
| 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 |
| Entity Central Index Key | 0001467858 |
| Amendment Flag | false |
