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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% |  |  |

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