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v3.25.1

Other Income, Net (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Other Nonoperating Income (Expense) [Line Items] |  |
Allowance for equity funds used during construction | $ 16 | $ 9
Other interest income | 11 | 8
Non-service cost components of net periodic benefit income | 66 | 76
Miscellaneous income | 3 | 2
Income (Loss) from Equity Method Investments | (4) | 0
Donations | (2) | (2)
Miscellaneous expense | (5) | (4)
Total Other Income, Net | 85 | 89
Union Electric Company |  |
Other Nonoperating Income (Expense) [Line Items] |  |
Allowance for equity funds used during construction | 8 | 9
Other interest income | 2 | 2
Non-service cost components of net periodic benefit income | 35 | 35
Miscellaneous income | 1 | 1
Donations | (1) | (1)
Miscellaneous expense | (2) | (2)
Total Other Income, Net | 43 | 44
Defined Benefit Plan, Non-service Cost or Income Components - Tracker | (16) | (9)
Ameren Illinois Company |  |
Other Nonoperating Income (Expense) [Line Items] |  |
Allowance for equity funds used during construction | 7 | 0
Other interest income | 9 | 6
Non-service cost components of net periodic benefit income | 20 | 27
Miscellaneous income | 2 | 1
Donations | (1) | (1)
Miscellaneous expense | (3) | (2)
Total Other Income, Net | $ 34 | $ 31

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