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Equity in Net Assets of Nonconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) $ 303 $ 50  
Automotive China JVs' net sales 44,020 43,014  
Automotive China JVs' net income (loss) 2,853 2,953  
Dividends declared 399   $ 395
Distributions received 788    
Equity Method Investee      
Schedule of Equity Method Investments [Line Items]      
Undistributed losses 342,000    
Automotive China Joint Ventures      
Schedule of Equity Method Investments [Line Items]      
Automotive China JVs' net sales 5,065 4,111  
Automotive China JVs' net income (loss) 70 (228)  
Automotive China Joint Ventures      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) 45 (106)  
Ultium Cells Holdings LLC equity income (loss)      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) 241 156  
Other joint ventures equity income (loss)      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) $ 17 $ 1  
Automotive China Joint Ventures and Ultium Cell Holdings LLC      
Schedule of Equity Method Investments [Line Items]      
Change in ownership percentage 0.00%