v3.26.1
Equity in Net Assets of Nonconsolidated Affiliates (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) $ 266 $ 303  
Automotive China JVs' net sales 43,624 44,020  
Automotive China JVs' net income (loss) 2,705 2,853  
Dividends declared 931,000   $ 926
Distributions received   788,000  
Automotive China joint ventures equity income (loss)      
Schedule of Equity Method Investments [Line Items]      
Automotive China JVs' net sales 5,692 5,065  
Automotive China JVs' net income (loss) 339 70  
Equity Method Investment, Nonconsolidated Investee or Group of Investees      
Schedule of Equity Method Investments [Line Items]      
Undistributed earnings 2,000   1,800
Undistributed losses 3,200   3,200
Equity Method Investee      
Schedule of Equity Method Investments [Line Items]      
Undistributed earnings 1,200   $ 1,500
Automotive China joint ventures equity income (loss)      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) 165 45  
Other joint ventures equity income (loss)      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss) $ 101 258  
Ultium Cells Holdings LLC      
Schedule of Equity Method Investments [Line Items]      
Equity income (loss)   $ 241  
Automotive China Joint Ventures and Ultium Cell Holdings LLC      
Schedule of Equity Method Investments [Line Items]      
Change in ownership percentage 0.00%