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Schedule I - Condensed Financial Information Of Parent
 12 Months Ended
Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]  
Condensed Financial Information Of Parent
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
AMEREN CORPORATION
CONDENSED STATEMENT OF INCOME AND COMPREHENSIVE INCOME
For the Years Ended December 31, 2023, 2022, and 2021
(In millions)202320222021
Operating revenues$— $— $— 
Operating expenses22 15 13 
Operating loss(22)(15)(13)
Equity in earnings of subsidiaries1,245 1,161 1,039 
Interest income from affiliates10 2 3 
Total other expense, net(11)(13)— 
Interest charges(119)(86)(64)
Income tax benefit49 25 25 
Net Income Attributable to Ameren Common Shareholders$1,152 $1,074 $990 
Net Income Attributable to Ameren Common Shareholders$1,152 $1,074 $990 
Other Comprehensive Income (Loss), Net of Taxes:
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $(2), $(4), and $4, respectively
(5)(14)14 
Comprehensive Income Attributable to Ameren Common Shareholders$1,147 $1,060 $1,004 
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
AMEREN CORPORATION
CONDENSED BALANCE SHEET
(In millions, except per share amounts)December 31, 2023December 31, 2022
Assets:
Cash and cash equivalents$16 $— 
Advances to money pool598 68 
Accounts receivable – affiliates20 59 
Miscellaneous accounts and notes receivable31 11 
Total current assets665 138 
Investments in subsidiaries14,573 13,394 
Accumulated deferred income taxes, net44 46 
Other assets149 137 
Total assets
$15,431 $13,715 
Liabilities and Shareholders’ Equity:
Current maturities of long-term debt$450 $— 
Short-term debt— 477 
Accounts payable2 — 
Taxes accrued10 5 
Accounts payable – affiliates100 52 
Other current liabilities45 41 
Total current liabilities607 575 
Long-term debt, net3,379 2,536 
Pension and other postretirement benefits19 19 
Other deferred credits and liabilities77 77 
Total liabilities4,082 3,207 
Commitments and Contingencies (Note 4)
Shareholders’ Equity:
Common stock, $.01 par value, 400.0 shares authorized – shares outstanding of 266.3 and 262.0, respectively
3 3 
Other paid-in capital, principally premium on common stock7,216 6,860 
Retained earnings4,136 3,646 
Accumulated other comprehensive income (loss)(6)(1)
Total shareholders’ equity11,349 10,508 
Total liabilities and shareholders’ equity$15,431 $13,715 
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
AMEREN CORPORATION
CONDENSED STATEMENT OF CASH FLOWS
For the Years Ended December 31, 2023, 2022, and 2021
(In millions)202320222021
Net cash flows provided by operating activities$171 $44 $79 
Cash flows from investing activities:
Money pool advances, net(530)40 (92)
Notes receivable – ATXI— 35 40 
Investments in subsidiaries(109)(30)(489)
Other5 3 7 
Net cash flows provided by (used in) investing activities(634)48 (534)
Cash flows from financing activities:
Dividends on common stock(662)(610)(565)
Short-term debt, net(475)198 (213)
Issuances of long-term debt1,298 — 949 
Issuances of common stock346 333 308 
Employee payroll taxes related to stock-based compensation(20)(16)(17)
Debt issuance costs(8)(1)(7)
Net cash flows provided by (used in) financing activities479 (96)455 
Net change in cash, cash equivalents, and restricted cash$16 $(4)$— 
Cash, cash equivalents, and restricted cash at beginning of year— 4 4 
Cash, cash equivalents, and restricted cash at end of year$16 $— $4 
Supplemental information:
Cash dividends received from consolidated subsidiaries$173 $76 $123 
Noncash financing activity – Issuance of common stock for stock-based compensation40 31 33 
Noncash financing activity – Issuance of common stock under the DRPlus7 8 — 
AMEREN CORPORATION (parent company only)
NOTES TO CONDENSED FINANCIAL STATEMENTS December 31, 2023
NOTE 1 – BASIS OF PRESENTATION
Ameren Corporation (parent company only) is a public utility holding company that conducts substantially all of its business operations through its subsidiaries. Ameren Corporation (parent company only) has accounted for its subsidiaries using the equity method. These financial statements are presented on a condensed basis.
See Note 1 – Summary of Significant Accounting Policies and Note 15 – Supplemental Information under Part II, Item 8, of this report for additional information.
NOTE 2 – SHORT-TERM DEBT AND LIQUIDITY
Ameren, Ameren Services, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company and applicable regulatory short-term borrowing authorizations, to access funding from the Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool. The total amount available to pool participants from the non-state-regulated subsidiary money pool at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. Interest revenues related to non-state-regulated money pool advances were $10 million in 2023 and immaterial in 2022 and 2021. Interest charges related to non-state-regulated money pool borrowings were immaterial in 2021, 2022, and 2023.
See Note 4 – Short-term Debt and Liquidity under Part II, Item 8, of this report for a description and details of short-term debt and liquidity needs of Ameren Corporation (parent company only).
NOTE 3 – LONG-TERM OBLIGATIONS
See Note 5 – Long-term Debt and Equity Financings under Part II, Item 8, of this report for additional information on Ameren Corporation’s (parent company only) long-term debt, indenture provisions, forward sale agreements related to common stock, and ATM program.
NOTE 4 – COMMITMENTS AND CONTINGENCIES
See Note 14 – Commitments and Contingencies under Part II, Item 8, of this report for a description of all material contingencies of Ameren Corporation (parent company only).
NOTE 5 – TOTAL OTHER EXPENSE, NET
The following table presents the components of “Total Other Expense, Net” in the Condensed Statement of Income and Comprehensive Income for the years ended December 31, 2023, 2022, and 2021:
(In millions)202320222021
Total Other Expense, Net
Non-service cost components of net periodic benefit income$8 $3 $1 
Donations(18)(15)— 
Other expense, net(1)(1)(1)
Total Other Expense, Net$(11)$(13)$— 
Other Income And Expenses
The following table presents the components of “Other Income, Net” in the Ameren Companies’ statements of income for the years ended December 31, 2023, 2022, and 2021:
202320222021
Ameren:
Other Income, Net
Allowance for equity funds used during construction$54 $43 $43 
Interest income on industrial development revenue bonds1 24 25 
Other interest income32 11 2 
Non-service cost components of net periodic benefit income(a)
295 184 136 
Miscellaneous income7 10 10 
Earnings related to equity method investments1 2 12 
Donations(24)(26)(9)
Miscellaneous expense(18)(22)(17)
Total Other Income, Net$348 $226 $202 
Ameren Missouri:
Other Income, Net
Allowance for equity funds used during construction$30 $24 $26 
Interest income on industrial development revenue bonds1 24 25 
Other interest income10 4 1 
Non-service cost components of net periodic benefit income(a)
97 55 55 
Miscellaneous income3 4 3 
Donations(2)(3)

(4)
Miscellaneous expense(9)(9)(7)
Total Other Income, Net$130 $99 $99 
Ameren Illinois:
Other Income, Net
Allowance for equity funds used during construction$19 $18 $17 
Interest income21 7 1 
Non-service cost components of net periodic benefit income124 84 55 
Miscellaneous income4 5 6 
Donations(4)(8)(5)
Miscellaneous expense(8)(10)(8)
Total Other Income, Net$156 $96 $66 
(a)For the years ended December 31, 2023, 2022, and 2021, the non-service cost components of net periodic benefit income were adjusted by amounts deferred of $27 million, $22 million, and $(7) 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 following table presents the components of “Total Other Expense, Net” in the Condensed Statement of Income and Comprehensive Income for the years ended December 31, 2023, 2022, and 2021:
(In millions)202320222021
Total Other Expense, Net
Non-service cost components of net periodic benefit income$8 $3 $1 
Donations(18)(15)— 
Other expense, net(1)(1)(1)
Total Other Expense, Net$(11)$(13)$—