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Other Income, Net | 6 Months Ended
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Jun. 30, 2023
Other Nonoperating Income (Expense) [Abstract] |
OTHER INCOME, NET | OTHER INCOME, NET The following table presents the components of “Other Income, Net” in the Ameren Companies’ statements of income for the three and six months ended June 30, 2023 and 2022:
| Three Months |  | Six Months |
| 2023 |  | 2022 |  | 2023 |  | 2022 |
Ameren: |  |  |  |  |  |  |  |
Allowance for equity funds used during construction | $ | 14 |  |  | $ | 11 |  |  | $ | 23 |  |  | $ | 19 |  |
Interest income on industrial development revenue bonds | — |  |  | 6 |  |  | 1 |  |  | 12 |  |
Non-service cost components of net periodic benefit income(a) | 63 |  |  | 47 |  |  | 127 |  |  | 93 |  |
Miscellaneous income | 11 |  |  | 5 |  |  | 20 |  |  | 9 |  |
Earnings related to equity method investments | — |  |  | 1 |  |  | 2 |  |  | 4 |  |
Donations | (2) |  |  | (2) |  |  | (4) |  |  | (4) |  |
Miscellaneous expense | (4) |  |  | (6) |  |  | (9) |  |  | (11) |  |
Total Other Income, Net | $ | 82 |  |  | $ | 62 |  |  | $ | 160 |  |  | $ | 122 |  |
Ameren Missouri: |  |  |  |  |  |  |  |
Allowance for equity funds used during construction | $ | 8 |  |  | $ | 6 |  |  | $ | 12 |  |  | $ | 10 |  |
Interest income on industrial development revenue bonds | — |  |  | 6 |  |  | 1 |  |  | 12 |  |
Non-service cost components of net periodic benefit income(a) | 14 |  |  | 14 |  |  | 28 |  |  | 28 |  |
Miscellaneous income | 3 |  |  | 1 |  |  | 7 |  |  | 3 |  |
Donations | (1) |  |  | (1) |  |  | (2) |  |  | (2) |  |
Miscellaneous expense | (2) |  |  | (2) |  |  | (5) |  |  | (4) |  |
Total Other Income, Net | $ | 22 |  |  | $ | 24 |  |  | $ | 41 |  |  | $ | 47 |  |
Ameren Illinois: |  |  |  |  |  |  |  |
Allowance for equity funds used during construction | $ | 6 |  |  | $ | 5 |  |  | $ | 10 |  |  | $ | 9 |  |
Non-service cost components of net periodic benefit income | 31 |  |  | 21 |  |  | 62 |  |  | 42 |  |
Miscellaneous income | 7 |  |  | 3 |  |  | 12 |  |  | 5 |  |
Donations | (1) |  |  | (1) |  |  | (2) |  |  | (2) |  |
Miscellaneous expense | (2) |  |  | (3) |  |  | (4) |  |  | (5) |  |
Total Other Income, Net | $ | 41 |  |  | $ | 25 |  |  | $ | 78 |  |  | $ | 49 |  |
(a)For the three and six months ended June 30, 2023 the non-service cost components of net periodic benefit income were adjusted by amounts deferred of $17 million and $34 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. The deferral was $5 million and $11 million, respectively, for the three and six months ended June 30, 2022. See Note 11 – Retirement Benefits for additional information.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 610 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//610/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 720 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//720/tableOfContent + Details
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