XML 64 R32.htm IDEA: XBRL DOCUMENT
v3.23.1

Supplemental Information (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Supplemental Information [Abstract] |
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 at March 31, 2023, and December 31, 2022:
| March 31, 2023 |  |  | December 31, 2022
Ameren |  | Ameren Missouri |  | Ameren Illinois |  |  | Ameren |  | Ameren Missouri |  | Ameren Illinois
“Cash and cash equivalents” | $ | 10 |  |  | $ | 3 |  |  | $ | — |  |  |  | $ | 10 |  |  | $ | — |  |  | $ | — |
Restricted cash included in “Other current assets” | 13 |  |  | 5 |  |  | 6 |  |  |  | 13 |  |  | 5 |  |  | 6 |
Restricted cash included in “Other assets” | 211 |  |  | — |  |  | 211 |  |  |  | 185 |  |  | — |  |  | 185 |
Restricted cash included in “Nuclear decommissioning trust fund” | 3 |  |  | 3 |  |  | — |  |  |  | 8 |  |  | 8 |  |  | — |
Total cash, cash equivalents, and restricted cash | $ | 237 |  |  | $ | 11 |  |  | $ | 217 |  |  |  | $ | 216 |  |  | $ | 13 |  |  | $ | 191 |
Schedule of Accounts, Notes, Loans and Financing Receivable | The following table provides a reconciliation of the beginning and ending amount of the allowance for doubtful accounts for the three months ended March 31, 2023 and 2022:
|  |  | Three Months
|  |  |  |  |  | 2023 |  | 2022 |
Ameren: |  |  |  |  |  |  |  |  |
Beginning of period |  |  |  |  |  | $ | 31 |  |  | $ | 29 |  |
Bad debt expense |  |  |  |  |  | 10 |  |  | 4 |  |
Net write-offs |  |  |  |  |  | (7) |  |  | (5) |  |
End of period |  |  |  |  |  | $ | 34 |  |  | $ | 28 |  |
Ameren Missouri: |  |  |  |  |  |  |  |  |
Beginning of period |  |  |  |  |  | $ | 13 |  |  | $ | 13 |  |
Bad debt expense |  |  |  |  |  | 2 |  |  | 1 |  |
Net write-offs |  |  |  |  |  | (3) |  |  | (3) |  |
End of period |  |  |  |  |  | $ | 12 |  |  | $ | 11 |  |
Ameren Illinois:(a) |  |  |  |  |  |  |  |  |
Beginning of period |  |  |  |  |  | $ | 18 |  |  | $ | 16 |  |
Bad debt expense |  |  |  |  |  | 8 |  |  | 3 |  |
Net write-offs |  |  |  |  |  | (4) |  |  | (2) |  |
End of period |  |  |  |  |  | $ | 22 |  |  | $ | 17 |  |
(a)Ameren Illinois has rate-adjustment mechanisms that allow it to recover the difference between its actual net bad debt write-offs under GAAP, including those associated with receivables purchased from alternative retail electric suppliers, and the amount of net bad debt write-offs included in its base rates.
Schedule of Cash Flow, Supplemental Disclosures | The following table provides noncash financing and investing activity excluded from the statements of cash flows for the three months ended March 31, 2023 and 2022:
| March 31, 2023 |  | March 31, 2022
Ameren | Ameren Missouri |  | Ameren Illinois | Ameren | Ameren Missouri | Ameren Illinois
Investing: |  |  |  |  |  |  |  |
Accrued capital expenditures | $ | 298 |  | $ | 153 |  |  | $ | 138 |  |  | $ | 345 |  | $ | 194 |  | $ | 147 |
Net realized and unrealized gain/(loss) – nuclear decommissioning trust fund | 54 |  | 54 |  |  | — |  |  | (71) |  | (71) |  | — |
Return of investment in industrial development revenue bonds(a) | 240 |  | 240 |  |  | — |  |  | — |  | — |  | — |
Financing: |  |  |  |  |  |  |  |
Issuance of common stock for stock-based compensation | $ | 37 |  | $ | — |  |  | $ | — |  |  | $ | 31 |  | $ | — |  | $ | — |
Issuance of common stock under the DRPlus | 7 |  | — |  |  | — |  |  | 8 |  | — |  | — |
Termination of a financing obligation(a) | 240 |  | 240 |  |  | — |  |  | — |  | — |  | — |
(a)In January 2023, Ameren Missouri and Audrain County mutually agreed to terminate a financing obligation agreement related to the CT energy center in Audrain County, which was scheduled to expire in December 2023. No cash was exchanged in connection with the termination of the agreement as the $240 million principal amount of the financing obligation due from Ameren Missouri was equal to the amount of bond service payments due to Ameren Missouri.
Asset Retirement Obligation Disclosure | The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the three months ended March 31, 2023:
| Ameren Missouri |  | Ameren Illinois |  |  |  | Ameren |
Balance at December 31, 2022 | $ | 782 |  | (a) | $ | 4 |  |  |  | (b) | $ | 786 |  | (a)
Liabilities settled | (2) |  |  | — |  |  |  |  | (2) |  |
Accretion | 8 |  | (c) | — |  |  |  |  | 8 |  | (c)
Balance at March 31, 2023 | $ | 788 |  | (a) | $ | 4 |  |  |  | (b) | $ | 792 |  | (a)
(a)Balance included $23 million in “Other current liabilities” on the balance sheet as of both March 31, 2023, and December 31, 2022. (b)Included in “Other deferred credits and liabilities” on the balance sheet. (c)Accretion expense attributable to Ameren Missouri was recorded as a decrease to regulatory liabilities.
Schedule of excise taxes | The following table presents the excise taxes recorded on a gross basis in “Operating Revenues – Electric,” “Operating Revenues – Natural gas” and “Operating Expenses – Taxes other than income taxes” on the statements of income for the three months ended March 31, 2023 and 2022:
|  |  | Three Months
|  |  |  |  | 2023 |  | 2022
Ameren Missouri |  |  |  |  | $ | 34 |  |  | $ | 34 |
Ameren Illinois |  |  |  |  | 37 |  |  | 45 |
Ameren |  |  |  |  | $ | 71 |  |  | $ | 79 |
Schedule of Earnings Per Share, Basic and Diluted | The following table reconciles the basic weighted-average number of common shares outstanding to the diluted weighted-average number of common shares outstanding for the three months ended March 31, 2023 and 2022:
|  |  | Three Months
|  |  |  |  | 2023 |  | 2022
Weighted-average Common Shares Outstanding – Basic |  |  |  |  | 262.2 |  |  | 257.9 |
Assumed settlement of performance share units and restricted stock units |  |  |  |  | 0.9 |  |  | 1.1 |
Weighted-average Common Shares Outstanding – Diluted(a) |  |  |  |  | 263.1 |  |  | 259.0 |
(a)There was an immaterial number of anti-dilutive performance share units excluded from the earnings per diluted share calculations for the three months ended March 31, 2023 and 2022. The outstanding forward sale agreements as of March 31, 2023, were anti-dilutive and excluded from the earnings per diluted share calculation as calculated using the treasury stock method.

X
- Definition [Table Text Block] for Tabular disclosure of the components of cash and cash equivalents, including restricted amounts. + References No definition available. + Details
Name: | aee_ScheduleofCashandCashEquivalentsIncludingRestrictedCashTableTextBlock
Namespace Prefix: | aee_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of excise taxes [Table Text Block] + References No definition available. + Details
Name: | aee_ScheduleofexcisetaxesTableTextBlock
Namespace Prefix: | aee_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Supplemental Information [Abstract] + References No definition available. + Details
Name: | aee_SupplementalInformationAbstract
Namespace Prefix: | aee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
Name: | us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration