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Equity in Net Assets of Nonconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
May 31, 2025
Schedule of Equity Method Investments [Line Items]                
Equity income (loss) $ 91   $ 240   $ 394 $ 291    
Automotive China JVs' net sales 47,122   47,969   91,141 90,983    
Automotive China JVs' net income (loss) 1,894 $ 2,853 2,877 $ 2,953 4,747 5,830    
Dividends declared         1,400   $ 395  
Distributions received 189       977 190    
Automotive China joint ventures equity income (loss)                
Schedule of Equity Method Investments [Line Items]                
Automotive China JVs' net sales 6,084   4,677   11,149 8,788    
Automotive China JVs' net income (loss) 127   (214)   197 (442)    
Equity Method Investment, Nonconsolidated Investee or Group of Investees                
Schedule of Equity Method Investments [Line Items]                
Undistributed earnings 2,300       2,300      
Undistributed losses 2,700       2,700      
Ultium Cells LLC                
Schedule of Equity Method Investments [Line Items]                
Principal amount               $ 1,800
Stated interest rate               5.70%
Related party receivable, charges 260              
Equity Method Investee                
Schedule of Equity Method Investments [Line Items]                
Undistributed earnings 443,000       443,000      
Automotive China joint ventures equity income (loss)                
Schedule of Equity Method Investments [Line Items]                
Equity income (loss) 71   (104)   116 (210)    
Ultium Cells Holdings LLC equity income (loss)                
Schedule of Equity Method Investments [Line Items]                
Equity income (loss) 11   324   252 479    
Other joint ventures equity income (loss)                
Schedule of Equity Method Investments [Line Items]                
Equity income (loss) $ 9   $ 21   $ 26 $ 22    
Automotive China Joint Ventures and Ultium Cell Holdings LLC                
Schedule of Equity Method Investments [Line Items]                
Change in ownership percentage         0.00%