XML 156 R83.htm IDEA: XBRL DOCUMENT
v3.25.4

Callaway Energy Center (Insurance Disclosure) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 USD ($)
Nuclear Waste Matters [Line Items] |
Number Of Years The Limit Of Liability And The Maximum Potential Annual Payments Are Adjusted | five years
Number of weeks of coverage after the first twelve weeks of an outage | 1
Number Of Additional Weeks After Initial Indemnity Coverage For Power Outage | 1.365
Public Liability And Nuclear Worker Liability - American Nuclear Insurers |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | $ 500.0
Maximum Assessments for Single Incidents | 0.0
Public Liability And Nuclear Worker Liability - Pool Participation |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 15,763.0
Maximum Assessments for Single Incidents | 166.0
Threshold Amount For which a Retrospective Assessment For a Covered loss is necessary | 500.0
Maximum Annual Payment Per Incident At Licensed Commercial Nuclear Reactor | 25.0
Public Liability And Nuclear Worker Liability |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 16,263.0
Maximum Assessments for Single Incidents | 166.0
Property Damage - Nuclear Electric Insurance Ltd |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 3,200.0
Maximum Assessments for Single Incidents | 22.0
Replacement Power - Nuclear Electric Insurance Ltd |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 490.0
Maximum Assessments for Single Incidents | 9.0
Amount of Weekly Indemnity Coverage Commencing Twelve Weeks After Power Outage | 4.5
Amount of additional weekly indemnity coverage commencing after initial indemnity coverage | 3.6
Amount Of Weekly Indemnity Coverage Thereafter Not Exceeding Policy Limit | 490.0
Sub-limit of for Non-Nuclear Events | 291.0
Radiation Event |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 2,700.0
Aggregate nuclear power industry insurance policy limit for losses from terrorist attacks within twelve month period | 3,200.0
Non-radiation event |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | 700.0
Aggregate nuclear power industry insurance policy limit for losses from terrorist attacks within twelve month period | 1,800.0
Property Damage European Mutual Association for Nuclear Insurance |
Nuclear Waste Matters [Line Items] |
Maximum Coverages | $ 490.0

X
- Definition Aggregate Nuclear Power Industry Insurance Policy Limit For Losses From Terrorist Attacks Within Twelve Month Period + References No definition available. + Details
Name: | aee_AggregateNuclearPowerIndustryInsurancePolicyLimitForLossesFromTerroristAttacksWithinTwelveMonthPeriod
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount Of Additional Weekly Indemnity Coverage Commencing After Initial Indemnity Coverage + References No definition available. + Details
Name: | aee_AmountOfAdditionalWeeklyIndemnityCoverageCommencingAfterInitialIndemnityCoverage
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of weekly indemnity coverage thereafter not exceeding policy limit + References No definition available. + Details
Name: | aee_AmountOfWeeklyIndemnityCoverageThereafterNotExceedingPolicyLimit
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of weekly indemnity coverage commencing twelve weeks after power outage + References No definition available. + Details
Name: | aee_AmountofWeeklyIndemnityCoverageCommencingTwelveWeeksAfterPowerOutage
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Insurance aggregate maximum coverage + References No definition available. + Details
Name: | aee_InsuranceAggregateMaximumCoverage
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Insurance maximum coverage per incident + References No definition available. + Details
Name: | aee_InsuranceMaximumCoveragePerIncident
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum Annual Payment Per Incident At Licensed Commercial Nuclear Reactor + References No definition available. + Details
Name: | aee_MaximumAnnualPaymentPerIncidentAtLicensedCommercialNuclearReactor
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition [Line Items] for Nuclear Waste Matters [Table] + References No definition available. + Details
Name: | aee_NuclearWasteMattersLineItems
Namespace Prefix: | aee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Additional Weeks After Initial Indemnity Coverage For Power Outage + References No definition available. + Details
Name: | aee_NumberOfAdditionalWeeksAfterInitialIndemnityCoverageForPowerOutage
Namespace Prefix: | aee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Weeks Of Coverage After The First Twelve Weeks Of An Outage + References No definition available. + Details
Name: | aee_NumberOfWeeksOfCoverageAfterTheFirstTwelveWeeksOfAnOutage
Namespace Prefix: | aee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of years the limit of liability and the maximum potential annual payments are adjusted + References No definition available. + Details
Name: | aee_NumberOfYearsTheLimitOfLiabilityAndTheMaximumPotentialAnnualPaymentsAreAdjusted
Namespace Prefix: | aee_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sub-limit of Amount of Weekly indemnity Coverage Thereafter Not Exceeding Policy Limit for Non-Nuclear Events + References No definition available. + Details
Name: | aee_SubLimitOfAmountOfWeeklyIndemnityCoverageThereafterNotExceedingPolicyLimitForNonNuclearEvents
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Threshold amount for retrospective insurance assessment for covered loss under public liability and nuclear worker liability insurance policy + References No definition available. + Details
Name: | aee_ThresholdAmountForRetrospectiveInsuranceAssessmentForCoveredLossUnderPublicLiabilityAndNuclearWorkerLiabilityInsurancePolicy
Namespace Prefix: | aee_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_PublicLiabilityAndNuclearWorkerLiabilityAmericanNuclearInsurersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_PublicLiabilityAndNuclearWorkerLiabilityPoolParticipationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_PublicLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_PropertyDamageNuclearElectricInsuranceLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_ReplacementPowerNuclearElectricInsuranceLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_RadiationEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_NonradiationeventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=aee_PropertyDamageEuropeanMutualAssociationforNuclearInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |