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Rate and Regulatory Matters (Regulatory Framework-Missouri) (Details) - Union Electric Company | 12 Months Ended
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Dec. 31, 2022 MWh
Public Utilities, General Disclosures [Line Items] |
Number of months to complete a regulatory rate review | 11 months
PISA Deferral Percentage | 85.00%
Depreciation Percentage Not Included in PISA Deferral | 15.00%
Sharing Level For Fac | 95.00%
Percentage of variance not covered by FAC | 5.00%
Amount of Megawatts | 102
Frequency Rates Must be Reset to Use the FAC | 4 years
Maximum |
Public Utilities, General Disclosures [Line Items] |
Public Utilities, Approved Rate Increase (Decrease), Percentage | 2.85%
PISA Rate Increase Limit Beginning 2024 | 2.50%
PISA |
Public Utilities, General Disclosures [Line Items] |
Amortization Period | 20 years

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- Definition Deferral percentage of the depreciation expense on certain property, plant, and equipment placed in-service and not included in base rates. + References No definition available. + Details
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- Definition The percentage of the net energy cost variance from the amounts set in base rates not allowed to be recovered or refunded through the FAC. + References No definition available. + Details
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- Definition The portion of the variance in net energy costs from the amount set in base rates Ameren Missouri is permitted to recover or refund, through customer rates, without a traditional regulatory rate review. + References No definition available. + Details
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