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Other Income, Net
 12 Months Ended
Dec. 31, 2024
Other Nonoperating Income (Expense) [Abstract]  
OTHER INCOME AND EXPENSES OTHER INCOME, NET
The following table presents the components of “Other Income, Net” in the Ameren Companies’ statements of income for the years ended December 31, 2024, 2023, and 2022:
202420232022
Ameren:
Other Income, Net
Allowance for equity funds used during construction$76 $54 $43 
Interest income on industrial development revenue bonds— 1 24 
Other interest income41 32 11 
Non-service cost components of net periodic benefit income(a)
304 295 184 
Miscellaneous income9 7 10 
Gain on extinguishment of debt(b)
16 — — 
Earnings (losses) related to equity method investments(4)1 2 
Donations(5)(24)(26)
Miscellaneous expense(20)(18)(22)
Total Other Income, Net$417 $348 $226 
Ameren Missouri:
Other Income, Net
Allowance for equity funds used during construction$58 $30 $24 
Interest income on industrial development revenue bonds— 1 24 
Other interest income8 10 4 
Non-service cost components of net periodic benefit income(a)
139 97 55 
Miscellaneous income4 3 4 
Donations(2)(2)

(3)
Miscellaneous expense(11)(9)(9)
Total Other Income, Net$196 $130 $99 
Ameren Illinois:
Other Income, Net
Allowance for equity funds used during construction$17 $19 $18 
Other Interest income32 21 7 
Non-service cost components of net periodic benefit income105 124 84 
Miscellaneous income4 4 5 
Donations(3)(4)(8)
Miscellaneous expense(8)(8)(10)
Total Other Income, Net$147 $156 $96 
(a)For the years ended December 31, 2024, 2023, and 2022, the non-service cost components of net periodic benefit income were adjusted by amounts deferred of $(41) million, $27 million, and $22 million, respectively, due to a regulatory tracking mechanism for the difference between the level of such costs incurred by Ameren Missouri under GAAP and the level of such costs included in rates. See Note 10 – Retirement Benefits for additional information.
(b)See Note 5 – Long-term Debt and Equity Financings for additional information on Ameren (parent)’s repurchase of Ameren Missouri’s senior secured notes and first mortgage bonds and Ameren Illinois’ first mortgage bonds that were accounted for as a debt extinguishment.