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Acquisitions and Other Transactions (Sale of Interest in Ethanol Joint Venture) (Details) - USD ($) $ in Millions | Jul. 31, 2025 | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | --- | ---
Business Combination [Line Items] |  |  |
Equity method investments |  | $ 6,999 | $ 6,795
The Andersons Marathon Holdings LLC |  |  |
Business Combination [Line Items] |  |  |
Percentage of ownership before transaction | 49.90% |  |
Proceeds from sale of equity method investments | $ 427 |  |
Equity method investments | $ 173 |  |

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