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Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2024
shares
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
During the three months ended March 31, 2024, the following directors or officers of the Company adopted a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K: (1) on February 23, 2024, Julian Blissett, Executive Vice President and President, GM China, adopted a trading plan intended to satisfy Rule 10b5-1(c) to sell up to 48,741 shares of GM common stock and up to 104,488 shares of GM common stock issuable upon exercise of vested options between May 28, 2024 and February 14, 2025, subject to certain conditions; (2) on February 26, 2024, Mary Barra, Chair and Chief Executive Officer, adopted trading plans intended to satisfy Rule 10b5-1(c) to sell up to 900,000 shares of GM common stock and up to 1,066,269 shares of GM common stock issuable upon exercise of vested options between May 28, 2024 and February 14, 2025, subject to certain conditions; and (3) on February 27, 2024, Mark Reuss, President, adopted a trading plan intended to satisfy Rule 10b5-1(c) to sell up to 200,000 shares of GM common stock and up to 122,283 shares of GM common stock issuable upon exercise of vested options between May 28, 2024 and February 14, 2025, subject to certain conditions.
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
Julian Blissett [Member]  
Trading Arrangements, by Individual  
Name Julian Blissett
Title Executive Vice President and President, GM China
Rule 10b5-1 Arrangement Adopted true
Adoption Date February 23, 2024
Arrangement Duration 262 days
Mary Barra [Member]  
Trading Arrangements, by Individual  
Name Mary Barra
Title Chair and Chief Executive Officer
Rule 10b5-1 Arrangement Adopted true
Adoption Date February 26, 2024
Arrangement Duration 262 days
Mark Reuss [Member]  
Trading Arrangements, by Individual  
Name Mark Reuss
Title President
Rule 10b5-1 Arrangement Adopted true
Adoption Date February 27, 2024
Arrangement Duration 262 days
Julian Blissett Rule Trading Arrangement Common Stock [Member] | Julian Blissett [Member]  
Trading Arrangements, by Individual  
Aggregate Available 48,741
Julian Blissett Rule Trading Arrangement Exercise Of Vested Stock Options [Member] | Julian Blissett [Member]  
Trading Arrangements, by Individual  
Aggregate Available 104,488
Mary Barra Rule Trading Arrangement Common Stock [Member] | Mary Barra [Member]  
Trading Arrangements, by Individual  
Aggregate Available 900,000
Mary Barra Rule Trading Arrangement Exercise Of Vested Stock Options [Member] | Mary Barra [Member]  
Trading Arrangements, by Individual  
Aggregate Available 1,066,269
Mark Reuss Rule Trading Arrangement Common Stock [Member] | Mark Reuss [Member]  
Trading Arrangements, by Individual  
Aggregate Available 200,000
Mark Reuss Rule Trading Arrangement Exercise Of Vested Stock Options [Member] | Mark Reuss [Member]  
Trading Arrangements, by Individual  
Aggregate Available 122,283