XML 74 R39.htm IDEA: XBRL DOCUMENT
v3.24.3

Short-Term Debt And Liquidity (Narrative) (Details) $ in Billions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 | Sep. 30, 2024 USD ($) | Sep. 30, 2023
Credit Agreements |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Net Liquidity Available | $ 1.1 |  | $ 1.1 |
Actual debt-to-capital ratio | 0.61 |  | 0.61 |
Utilities |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Short-term Debt, Weighted Average Interest Rate, over Time | 5.29% | 5.50% | 5.37% | 5.20%
Union Electric Company | Missouri Credit Agreement |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Actual debt-to-capital ratio | 0.49 |  | 0.49 |
Ameren Illinois Company | Illinois Credit Agreement |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Actual debt-to-capital ratio | 0.45 |  | 0.45 |

X
- Definition The net liquidity available is based on credit facility borrowings, commercial paper outstanding, and letters of credit issued under the Credit Agreements, along with cash and cash equivalents. + References No definition available. + Details
Name: | aee_NetLiquidityAvailable
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Indebtedness divided by net capital. + References No definition available. + Details
Name: | us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of short-term debt outstanding calculated over time. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtWeightedAverageInterestRateOverTime
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=aee_CreditAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=aee_UtilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aee_UnionElectricCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=aee_MissouriCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aee_AmerenIllinoisCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=aee_IllinoisCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |