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Segment Reporting - Revenues and long-lived assets by geographic region (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]      
GM Financial $ 14,184 $ 12,760 $ 13,414
Net Sales and Revenue 171,842 156,735 127,004
Long-lived assets $ 80,903 $ 77,950 $ 79,044
MEXICO | Assets, Total | Geographic Concentration Risk      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Concentration risk, percentage 12.00% 11.00% 10.00%
Automotive | U.S.      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Automotive net sales and revenue $ 127,472 $ 116,798 $ 92,771
Long-lived assets 34,142 30,201 27,192
Automotive | Non-U.S.      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Automotive net sales and revenue 30,186 27,177 20,819
Long-lived assets 16,054 14,907 13,771
GM Financial      
Revenues from External Customers and Long-Lived Assets [Line Items]      
GM Financial 14,184 12,760 13,414
GM Financial | U.S.      
Revenues from External Customers and Long-Lived Assets [Line Items]      
GM Financial 12,133 11,035 11,712
Long-lived assets 27,397 29,411 34,452
GM Financial | Non-U.S.      
Revenues from External Customers and Long-Lived Assets [Line Items]      
GM Financial 2,051 1,725 1,702
Long-lived assets $ 3,309 $ 3,431 $ 3,629