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Schedule I - Condensed Financial Information Of Parent
 12 Months Ended
Dec. 31, 2022
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, 2022, 2021, and 2020
(In millions)202220212020
Operating revenues$— $— $— 
Operating expenses15 13 12 
Operating loss(15)(13)(12)
Equity in earnings of subsidiaries1,161 1,039 908 
Interest income from affiliates2 3 4 
Total other expense, net(13)— (8)
Interest charges(86)(64)(57)
Income tax benefit25 25 36 
Net Income Attributable to Ameren Common Shareholders$1,074 $990 $871 
Net Income Attributable to Ameren Common Shareholders$1,074 $990 $871 
Other Comprehensive Income (Loss), Net of Taxes:
Pension and other postretirement benefit plan activity, net of income taxes (benefit) of $(4), $4, and $5, respectively
(14)14 16 
Comprehensive Income Attributable to Ameren Common Shareholders$1,060 $1,004 $887 
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
AMEREN CORPORATION
CONDENSED BALANCE SHEET
(In millions, except per share amounts)December 31, 2022December 31, 2021
Assets:
Cash and cash equivalents$— $— 
Advances to money pool68 108 
Accounts receivable – affiliates59 30 
Miscellaneous accounts and notes receivable11 11 
Other current assets— 4 
Total current assets138 153 
Investments in subsidiaries13,394 12,281 
Note receivable – ATXI— 35 
Accumulated deferred income taxes, net46 65 
Other assets137 184 
Total assets
$13,715 $12,718 
Liabilities and Shareholders’ Equity:
Short-term debt$477 $277 
Taxes accrued5 7 
Accounts payable – affiliates52 53 
Other current liabilities41 38 
Total current liabilities575 375 
Long-term debt2,536 2,533 
Pension and other postretirement benefits19 24 
Other deferred credits and liabilities77 86 
Total liabilities3,207 3,018 
Commitments and Contingencies (Note 5)
Shareholders’ Equity:
Common stock, $.01 par value, 400.0 shares authorized – shares outstanding of 262.0 and 257.7, respectively
3 3 
Other paid-in capital, principally premium on common stock6,860 6,502 
Retained earnings3,646 3,182 
Accumulated other comprehensive income (loss)(1)13 
Total shareholders’ equity10,508 9,700 
Total liabilities and shareholders’ equity$13,715 $12,718 
SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT
AMEREN CORPORATION
CONDENSED STATEMENT OF CASH FLOWS
For the Years Ended December 31, 2022, 2021, and 2020
(In millions)202220212020
Net cash flows provided by operating activities$44 $79 $147 
Cash flows from investing activities:
Money pool advances, net40 (92)86 
Notes receivable – ATXI35 40 — 
Investments in subsidiaries(30)(489)(956)
Other3 7 8 
Net cash flows provided by (used in) investing activities48 (534)(862)
Cash flows from financing activities:
Dividends on common stock(610)(565)(494)
Short-term debt, net198 (213)337 
Money pool borrowings, net— — (24)
Maturities of long-term debt— — (350)
Issuances of long-term debt— 949 798 
Issuances of common stock333 308 476 
Employee payroll taxes related to stock-based compensation(16)(17)(20)
Debt issuance costs(1)(7)(7)
Net cash flows provided by (used in) financing activities(96)455 716 
Net change in cash, cash equivalents, and restricted cash$(4)$— $1 
Cash, cash equivalents, and restricted cash at beginning of year4 4 3 
Cash, cash equivalents, and restricted cash at end of year$— $4 $4 
Supplemental information:
Cash dividends received from consolidated subsidiaries$76 $123 $105 
Noncash financing activity – Issuance of common stock for stock-based compensation31 33 38 
AMEREN CORPORATION (parent company only)
NOTES TO CONDENSED FINANCIAL STATEMENTS December 31, 2022
NOTE 1 – BASIS OF PRESENTATION
Ameren Corporation (parent company only) is a public utility holding company that conducts substantially all of its business operations through its subsidiaries. Ameren Corporation (parent company only) has accounted for its subsidiaries using the equity method. These financial statements are presented on a condensed basis.
See Note 1 – Summary of Significant Accounting Policies under Part II, Item 8, of this report for additional information.
NOTE 2 – CASH AND CASH EQUIVALENTS
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheet and the statement of cash flows as of December 31, 2022 and 2021:
(In millions)20222021
Cash and cash equivalents$— $— 
Restricted cash included in “Other current assets”— 4 
Total cash, cash equivalents, and restricted cash$— $4 
See Note 1 – Summary of Significant Accounting Policies under Part II, Item 8, of this report for additional information.
NOTE 3 – 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 and interest charges related to non-state-regulated money pool advances and borrowings were immaterial in 2020, 2021, and 2022.
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 4 – 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 5 – 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 6 – 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, 2022, 2021, and 2020:
(In millions)202220212020
Total Other Expense, Net
Non-service cost components of net periodic benefit income$3 $1 $1 
Donations(15)— (8)
Other expense, net(1)(1)(1)
Total Other Expense, Net$(13)$— $(8)
Schedule of Cash and Cash Equivalents Including Restricted Cash
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets and the statements of cash flows as of December 31, 2022 and 2021:
December 31, 2022December 31, 2021
AmerenAmeren
Missouri		Ameren
Illinois		AmerenAmeren
Missouri		Ameren
Illinois
Cash and cash equivalents$10 $— $— $8 $— $— 
Restricted cash included in “Other current assets”13 5 6 16 4 6 
Restricted cash included in “Other assets”185 — 185 127 — 127 
Restricted cash included in “Nuclear decommissioning trust fund”8 8 — 4 4 — 
Total cash, cash equivalents, and restricted cash$216 $13 $191 $155 $8 $133 
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheet and the statement of cash flows as of December 31, 2022 and 2021:
(In millions)20222021
Cash and cash equivalents$— $— 
Restricted cash included in “Other current assets”— 4 
Total cash, cash equivalents, and restricted cash$— $4 
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, 2022, 2021, and 2020:
202220212020
Ameren:
Other Income, Net
Allowance for equity funds used during construction$43 $43 $32 
Interest income on industrial development revenue bonds24 25 25 
Other interest income11 2 4 
Non-service cost components of net periodic benefit income(a)
184 136 116 
Miscellaneous income10 10 10 
Earnings related to equity method investments2 12 3 
Donations(26)(9)(25)
(b)
Miscellaneous expense(22)(17)(14)
Total Other Income, Net$226 $202 $151 
Ameren Missouri:
Other Income, Net
Allowance for equity funds used during construction$24 $26 $19 
Interest income on industrial development revenue bonds24 25 25 
Other interest income4 1 1 
Non-service cost components of net periodic benefit income(a)
55 55 46 
Miscellaneous income4 3 4 
Donations(3)(4)

(12)
(b)
Miscellaneous expense(9)(7)(7)
Total Other Income, Net$99 $99 $76 
Ameren Illinois:
Other Income, Net
Allowance for equity funds used during construction$18 $17 $13 
Interest income7 1 3 
Non-service cost components of net periodic benefit income84 55 48 
Miscellaneous income5 6 6 
Donations(8)(5)(5)
Miscellaneous expense(10)(8)(6)
Total Other Income, Net$96 $66 $59 
(a)For the years ended December 31, 2022, 2021, and 2020, the non-service cost components of net periodic benefit income were adjusted by amounts deferred of $22 million, $(7) million, and $(4) 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.
(b)Includes $8 million pursuant to Ameren Missouri’s March 2020 electric rate order.
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, 2022, 2021, and 2020:
(In millions)202220212020
Total Other Expense, Net
Non-service cost components of net periodic benefit income$3 $1 $1 
Donations(15)— (8)
Other expense, net(1)(1)(1)
Total Other Expense, Net$(13)$— $(8)