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Other Income, Net (Other Income And Expenses) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Other Nonoperating Income (Expense) [Line Items] |  |  |
Allowance for equity funds used during construction | $ 76 | $ 54 | $ 43
Interest income on industrial development revenue bonds | 0 | 1 | 24
Other interest income | 41 | 32 | 11
Non-service cost components of net periodic benefit income | 304 | 295 | 184
Miscellaneous income | 9 | 7 | 10
Gain (Loss) on Extinguishment of Debt | 16 | 0 | 0
Equity in earnings of subsidiaries | (4) | 1 | 2
Donations | (5) | (24) | (26)
Miscellaneous expense | (20) | (18) | (22)
Total other income, net | 417 | 348 | 226
Ameren Missouri |  |  |
Other Nonoperating Income (Expense) [Line Items] |  |  |
Allowance for equity funds used during construction | 58 | 30 | 24
Interest income on industrial development revenue bonds | 0 | 1 | 24
Other interest income | 8 | 10 | 4
Non-service cost components of net periodic benefit income | 139 | 97 | 55
Miscellaneous income | 4 | 3 | 4
Donations | (2) | (2) | (3)
Miscellaneous expense | (11) | (9) | (9)
Total other income, net | 196 | 130 | 99
Defined Benefit Plan, Non-service Cost or Income Components - Tracker | (41) | 27 | 22
Ameren Illinois |  |  |
Other Nonoperating Income (Expense) [Line Items] |  |  |
Allowance for equity funds used during construction | 17 | 19 | 18
Other interest income | 32 | 21 | 7
Non-service cost components of net periodic benefit income | 105 | 124 | 84
Miscellaneous income | 4 | 4 | 5
Donations | (3) | (4) | (8)
Miscellaneous expense | (8) | (8) | (10)
Total other income, net | $ 147 | $ 156 | $ 96

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