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Insider Trading Arrangements
 3 Months Ended 9 Months Ended
Sep. 30, 2024
shares
Sep. 30, 2024
shares
Trading Arrangements, by Individual    
Non-Rule 10b5-1 Arrangement Adopted false  
Rule 10b5-1 Arrangement Terminated false  
Non-Rule 10b5-1 Arrangement Terminated false  
Craig Glidden [Member]    
Trading Arrangements, by Individual    
Material Terms of Trading Arrangement  
During the three months ended September 30, 2024, Craig Glidden, Executive Vice President and Strategic Advisor, adopted a "Rule 10b5-1 trading arrangement" as such term is defined in Item 408(a) of Regulation S-K, on August 19, 2024, to sell up to 141,005 shares of GM common stock and up to 331,561 shares of GM common stock issuable upon exercise of vested options between November 18, 2024 and February 14, 2025, subject to certain conditions.
Name Craig Glidden  
Title Executive Vice President and Strategic Advisor  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date August 19, 2024  
Expiration Date February 14, 2025  
Arrangement Duration 88 days  
Craig Glidden Trading Arrangement Common Stock [Member] | Craig Glidden [Member]    
Trading Arrangements, by Individual    
Aggregate Available 141,005 141,005
Craig Glidden Trading Arrangement, Exercise Of Vested Stock Options [Member] | Craig Glidden [Member]    
Trading Arrangements, by Individual    
Aggregate Available 331,561 331,561