v3.25.4
Equity in Net Assets of Nonconsolidated Affiliates - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
jointVenture
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Schedule of Equity Method Investments [Line Items]      
Basis difference $ 1,600 $ 1,900  
Number of joint ventures engaged in production, import and sale of products | jointVenture 4    
Equity loss $ 600 4,675 $ (480)
Equity in net assets of nonconsolidated affiliates $ 5,681 $ 7,102 $ 10,613
SGM      
Schedule of Equity Method Investments [Line Items]      
Number of interests in other joint ventures | jointVenture 3    
SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00% 50.00%  
SGM | SAIC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00%    
SGM DY      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00% 25.00%  
SGM DY | SAIC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00%    
SGM DY | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00%    
SGM DYPT      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00% 25.00%  
SGM DYPT | SAIC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00%    
SGM DYPT | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00%    
SGM Norsom      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00% 25.00%  
SGM Norsom | SAIC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 25.00%    
SGM Norsom | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00%    
Shanghai OnStar      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 40.00% 40.00%  
Shanghai OnStar | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 20.00%    
SAIC-GMAC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 35.00% 35.00%  
Temporary impairment charge   $ 300  
Equity in net assets of nonconsolidated affiliates   $ 1,500  
SAIC-GMAC | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 20.00%    
SAIC-GMAC | Shanghai Automotive Group Finance Company Ltd.      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 45.00%    
SAIC-GMF Leasing Co., Ltd.      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 35.00% 35.00%  
SAIC-GMF Leasing Co., Ltd. | SGM      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 20.00%    
SAIC-GMF Leasing Co., Ltd. | SAIC Financial Holdings Company      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 45.00%    
Automotive China JVs      
Schedule of Equity Method Investments [Line Items]      
Equity loss $ 300 $ 4,400  
Restructuring costs $ 600    
Impairment and restructuring charges   2,000  
Temporary impairment charge   2,100  
SGM, SGM Norsom, SGM DY, and SGM DYPT      
Schedule of Equity Method Investments [Line Items]      
Equity in net assets of nonconsolidated affiliates   $ 2,400