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v3.25.1

Short-Term Debt And Liquidity (Narrative) (Details) $ in Billions | 3 Months Ended
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Mar. 31, 2025 USD ($) | Mar. 31, 2024
Credit Agreements |  |
Short-term Debt [Line Items] |  |
Net Liquidity Available | $ 1.3 |
Actual debt-to-capital ratio | 0.61 |
Utilities |  |
Short-term Debt [Line Items] |  |
Short-term Debt, Weighted Average Interest Rate, over Time | 4.52% | 5.32%
Union Electric Company | Missouri Credit Agreement |  |
Short-term Debt [Line Items] |  |
Actual debt-to-capital ratio | 0.50 |
Ameren Illinois Company | Illinois Credit Agreement |  |
Short-term Debt [Line Items] |  |
Actual debt-to-capital ratio | 0.45 |

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- Definition The net liquidity available is based on credit facility borrowings, commercial paper outstanding, and letters of credit issued under the Credit Agreements, along with cash and cash equivalents. + References No definition available. + Details
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