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Utility plant in service - net Property, Plant and Equipment, Plant In Service, Net Public utilities, property, plant and equipment, plant in service, net Percentage of direct and indirect ownership share of IPALCO Percentage Of Direct And Indirect Ownership Share Of IPALCO Percentage Of Direct And Indirect Ownership Share Of IPALCO City Area Code City Area Code Business Combination, Consideration Transferred, Equity Interest, Type [Axis] Business Combination, Consideration Transferred, Equity Interest, Type [Axis] FMB Twenty - three FMB Twenty - three [Member] FMB Twenty - three AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Transmission Revenue Transmission Revenue [Member] Transmission Revenue Amount of New Operation for Battery Storage Unit, megawatts Amount of New Operation for Battery Storage Unit, megawatts Amount of New Operation for Battery Storage Unit, megawatts Corporate Segment Corporate Segment [Member] Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, after Tax Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), Adjustments, after Tax Accumulated Other Income (Loss) Accumulated Other Income (Loss) Accumulated Other Income (Loss) frozen at date of de-designation of swaps as cash flow hedges. Fair Value Debt Instrument, Fair Value Disclosure Aggregated Principal Amount of First Mortgage Bonds to the Indiana Finance Authority in Two Series Aggregated Principal Amount of First Mortgage Bonds to the Indiana Finance Authority in Two Series [Member] Aggregated Principal Amount of First Mortgage Bonds to the Indiana Finance Authority in Two Series Tax Credit Transfer Receivable Tax Credit Transfer Receivable Tax Credit Transfer Receivable Distributions to shareholders Payments of Dividends INCOME BEFORE INCOME TAX Interest Costs Incurred [Abstract] RTO Capacity Revenue RTO Capacity Revenue RTO Capacity Revenue Regulatory Liability [Domain] Regulatory Liability [Domain] Allowance for Funds Used During Construction, Equity Portion Allowance for Funds Used During Construction, Equity Portion Allowance for Funds Used During Construction, Equity Portion Statement [Line Items] Statement [Line Items] Cumulative preferred stock of subsidiary Cumulative Preferred Stock Of Subsidiary Cumulative preferred stock of subsidiary. TOTAL ASSETS Assets Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan [Table] Entity [Domain] Entity [Domain] Unsecured Debt, Current Unsecured Debt, Current Financial Transmission Rights Fair Value Disclosure Financial Transmission Rights Fair Value Disclosure Financial Transmission Rights Fair Value Disclosure Regulatory Assets Related to Pensions [Roll Forward] Regulatory Assets Related to Pensions [Roll Forward] Regulatory Assets Related to Pensions [Roll Forward] Large Commercial and Industrial Large Commercial and Industrial [Member] Large Commercial and Industrial First Mortgage Bond 4.70%, Due September 2045 [Member] First Mortgage Bond Nineteen [Member] First Mortgage Bond Nineteen [Member] Amortization of prior service cost Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Operating Segments Operating Segments [Member] Environmental Mitigation Project Costs Environmental Mitigation Project Costs $5 million environmental mitigation project consisting of the construction and operation of a new, non-emitting source of generation at the site Noncontrolling Interest, Increase from Sale of Parent Equity Interest Noncontrolling Interest, Increase from Sale of Parent Equity Interest Noncontrolling Interest, Increase from Sale of Parent Equity Interest First Mortgage Bond 3.875% Due August 2021 [Member] First Mortgage Bond Eight [Member] First Mortgage Bond Eight [Member] Energy [Domain] Energy [Domain] Contract with Customer, Duration [Domain] Contract with Customer, Duration [Domain] Unfunded obligation Defined Benefit Plan, Benefit Obligation Issued Guarantees Issued Guarantees Issued Guarantees Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Other non-current liabilities Other Liabilities, Noncurrent Realized Gains Forward Power Contracts Realized Gains Forward Power Contracts [Member] Realized Gains Forward Power Contracts Retirement Plan Type [Axis] Retirement Plan Type [Axis] Crosstrack Energy Storage Project MwH Crosstrack Energy Storage Project MwH Crosstrack Energy Storage Project MwH Finance Lease, Liability, to be Paid, after Year Five Finance Lease, Liability, to be Paid, after Year Five Contract with Customer, Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accrued taxes Taxes Payable, Current Retained Earnings [Member] Retained Earnings [Member] FMB Twenty - two FMB Twenty - two [Member] FMB Twenty - two Money Market Funds [Member] Money Market Funds [Member] Revision of Prior Period [Domain] Revision of Prior Period [Domain] Schedule Of Face And Fair Value Of Debt Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Number of facilities with violations of Federal Clean Air Act Number of Facilities with Violations of Federal Clean Air Act Number of Facilities with Violations of Federal Clean Air Act Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Prepayments and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Purchase of Units Derivative Instruments Financial Transmission Rights Purchase of Units Derivative Instruments Financial Transmission Rights The aggregate notional amount of contracts to purchase financial transmission rights Public Utilities, Rate Bases Public Utilities, Rate Bases Public Utilities, Rate Bases Cash Flow Hedging Cash Flow Hedging [Member] Derivative Instruments and Hedging Activities [Abstract] Derivative Instruments and Hedging Activities [Abstract] Derivative Instruments and Hedging Activities [Abstract] Other Assets, Noncurrent [Abstract] Other Assets, Noncurrent [Abstract] Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation Customer Credit Customer Credit Customer Credit for future rate cases Utilities Operating Expense, Maintenance and Operations Utilities Operating Expense, Maintenance and Operations First Mortgage Bond 4.65% Due June 2043 [Member] First Mortgage Bond Seventeen [Member] First Mortgage Bond Seventeen [Member] Accounts Receivable, Allowance for Credit Loss, Writeoff Accounts Receivable, Allowance for Credit Loss, Writeoff Business Combination, Recognized Asset Acquired, Asset Business Combination, Recognized Asset Acquired, Asset Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant and equipment, net of accumulated depreciation of $3,089,173 and $3,288,070, respectively Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Interest cost Interest cost Defined Benefit Plan, Interest Cost Environmental Facilities Refunding Revenue Notes, Series 2015A [Member] Environmental Facilities Refunding Revenue Notes, Series 2015A [Member] Environmental Facilities Refunding Revenue Notes, Series 2015A [Member] Property, Plant, and Equipment, Lessor Asset under Operating Lease Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table Text Block] Redeemable Noncontrolling Interest, Equity, Common, Redemption Value Redeemable Noncontrolling Interest, Equity, Common, Redemption Value Derivative Asset Derivative Asset Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] Lessor, Leases [Policy Text Block] Lessor, Leases [Policy Text Block] Subsegments [Domain] Subsegments [Domain] Repayments of Debt and Lease Obligation Repayments of Debt and Lease Obligation Accrued interest Increase (Decrease) in Interest Payable, Net Four Point Two Five Percent Senior Secured Notes Three Point Four Five Percent Senior Secured Notes [Member] Four Point Two Five Percent Senior Secured Notes [Member] Four Point Two Five Percent Senior Secured Notes [Member] Subsegments [Axis] Subsegments [Axis] Payment for (Proceeds from) Other Investing Activity Payment for (Proceeds from) Other Investing Activity Inventories Increase (Decrease) in Inventories Temporary Equity, Share Subscriptions Temporary Equity, Share Subscriptions Segment Reporting [Table] Segment Reporting [Table] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Finance Lease, Liability, to be Paid, Rolling Year Two Finance Lease, Liability, to be Paid, Rolling Year Two Lease, Cost Lease, Cost [Table Text Block] Other Assets, Current Other Assets, Current Public Utilities, Approved Debt Capital Structure, Percentage Public Utilities, Approved Debt Capital Structure, Percentage Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] OTHER (EXPENSE) / INCOME, NET: Other Nonoperating Income (Expense) [Abstract] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Operating Income (Loss) OPERATING INCOME Operating Income (Loss) Change in Accounting Principle, Type [Axis] Change in Accounting Principle, Type [Axis] Current Fiscal Year End Date Current Fiscal Year End Date Proceeds from Issuance of Debt Proceeds from Issuance of Debt Pike Co BESS Project MwH Pike Co BESS Project MwH Pike Co BESS Project MwH Contract with Customer, Duration [Axis] Contract with Customer, Duration [Axis] Derivative [Line Items] Derivative [Line Items] Entity File Number Entity File Number Crossvine Project Storage Capacity Crossvine Project Storage Capacity Crossvine Project Storage Capacity Service cost Service cost Defined Benefit Plan, Service Cost Capitalized Cost, Software to be Sold, Leased, or Marketed, Amortization Expense Capitalized Cost, Software to be Sold, Leased, or Marketed, Amortization Expense Payments for financing fees Payments of Deferred Finance Costs Payments of Deferred Finance Costs Debt Instrument, Issued, Principal Debt Instrument, Issued, Principal Allowance for Funds Used During Construction, Capitalized Interest Allowance for Funds Used During Construction, Capitalized Interest FMB Twenty Seven FMB Twenty Seven [Member] FMB Twenty Seven Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Revenue from Contracts with Customers Revenue from Contracts with Customers [Table Text Block] Revenue from Contracts with Customers Tax Exempt Refund Revenue Bonds Outstanding Value Tax Exempt Refund Revenue Bonds Outstanding Value [Member] Tax Exempt Refund Revenue Bonds Outstanding Value Entity Information [Line Items] Entity Information [Line Items] Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Asset retirement obligations, non-current Asset Retirement Obligations, Noncurrent Payments for Project Development Costs Payments for Project Development Costs Payments for Project Development Costs Pike Co Bess Second Sell Down Pike Co Bess Second Sell Down [Member] Pike Co Bess Second Sell Down Change in Accounting Principle, Type [Domain] Change in Accounting Principle, Type [Domain] Payments for (Proceeds from) Removal Costs Payments for (Proceeds from) Removal Costs Change in Right-of-Use Asset Lease Liability Change in Right-of-Use Asset Lease Liability Amount of increase in lease liability connected to the right of use asset Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Income Tax Paid, after Refund Received Income Tax Paid, after Refund Received Increase (Decrease) in Regulatory Assets and Liabilities Increase (Decrease) in Regulatory Assets and Liabilities Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Foundry Works Energy Storage Project MW Foundry Works Energy Storage Project MW Foundry Works Energy Storage Project MW LIABILITIES AND SHAREHOLDERS’ EQUITY Capitalization, Long-Term Debt and Equity [Abstract] Entity Interactive Data Current Entity Interactive Data Current Finance Lease, Liability, Current Finance Lease, Liability, Current Net Income (Loss) Attributable to Noncontrolling Interest Net Income (Loss) Attributable to Noncontrolling Interest Deferred Income Tax Liabilities, Net Deferred Income Tax Liabilities, Net Proceeds from Contributions from Parent Proceeds from Contributions from Parent Entity Small Business Entity Small Business Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unamortized debt discount Debt Instrument, Unamortized Discount Unamortized discount - net Debt Instrument, Unamortized Discount Utility Plant [Domain] Utility Plant [Domain] Regulatory Matters [Line Items] Regulatory Matters [Line Items] Regulatory Matters [Line Items] Subsequent Events [Abstract] Equity Capital Contribution Equity Capital Contribution Equity Capital Contribution Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Total other non-current assets Other Assets, Noncurrent Finance Lease, Liability, to be Paid, Year Three Finance Lease, Liability, to be Paid, Year Three Document Type Document Type Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Gain (Loss) on Extinguishment of Debt Loss on early extinguishment of debt Gain (Loss) on Extinguishment of Debt Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Short-term borrowings from affiliate Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number First Mortgage Bond 5.40% Due August 2017 [Member] First Mortgage Bond Five [Member] First Mortgage Bond Five [Member] First Mortgage Bond Five [Member] Utility Utility [Member] Utility First Mortgage Bond 6.05% Due October 2036 [Member] First Mortgage Bond Fourteen [Member] First Mortgage Bond Fourteen [Member] Retail Revenue [Member] Retail Revenue [Member] Retail Revenue [Member] Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Public Utilities, Requested Debt Capital Structure, Percentage Public Utilities, Requested Debt Capital Structure, Percentage Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Fixed Rate [Member] Fixed Rate [Member] Fixed Rate [Member] Petersburg Energy Storage Project MW Petersburg Energy Storage Project MW Petersburg Energy Storage Project MW REVENUE UTILITY OPERATING REVENUES Revenues Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Income Tax Contingency [Table] Income Tax Contingency [Table] Number of Interest Rate Swaps Number of Interest Rate Swaps Number of Interest Rate Swaps Renewable Energy Program Renewable Energy Program [Member] Environmental Remediation Contingency [Axis] Environmental Remediation Contingency [Axis] Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Other Comprehensive Income (Loss), Tax Other Comprehensive Income (Loss), Tax AES Indiana energy storage facility MWh planned to acquire AES Indiana Energy Storage Facility MWh Planned To Be Acquired AES Indiana energy storage facility MWh planned to be acquired and developed in Pike County, Indiana with expected completion in 2024. Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Lessor, Operating Lease, Payment to be Received, Year Four Lessor, Operating Lease, Payment to be Received, Year Four Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventory, Net Inventory, Net First Mortgage Bond Twenty Six First Mortgage Bond Twenty Six [Member] First Mortgage Bond Twenty Six Finance Lease, Interest Expense Finance Lease, Interest Expense Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2025) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Eagle Valley uncollectible outage costs Eagle Valley uncollectible outage costs, net Previously deferred costs as a result of the unplanned CCGT outage at Eagle Valley that AES Indiana agreed not to recover. Pike Co BESS Project MW Pike Co BESS Project MW Pike Co BESS Project MW Geographical [Axis] Geographical [Axis] Accrued Liabilities and Other Liabilities Accrued Liabilities and Other Liabilities Five Point Seven Five Percent Senior Secured Notes Five Point Seven Five Percent Senior Secured Notes [Member] Five Point Seven Five Percent Senior Secured Notes Lessor, Operating Lease, Payments to be Received Lessor, Operating Lease, Payment to be Received Contract with Customer, Liability Contract with Customer, Liability Non-cash Contributions from Noncontrolling Interests Related to Tax Credit Transfers Non-cash Contributions from Noncontrolling Interests Related to Tax Credit Transfers Non-cash Contributions from Noncontrolling Interests Related to Tax Credit Transfers Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax (Deprecated 2025) Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax (Deprecated 2025) Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Mutual Fund [Member] Mutual Fund [Member] Liability Class [Axis] Liability Class [Axis] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Preferred Stock Dividends, Income Statement Impact Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] DSM program costs [Member] Demand Side Management Program Costs [Member] Demand Side Management Program Costs [Member] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Inventories Public Utilities, Inventory Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Lease, Cost Lease, Cost Derivative, Nonmonetary Notional Amount, Purchase (Sales), Net Derivative, Nonmonetary Notional Amount, Purchase (Sales), Net Derivative, Nonmonetary Notional Amount, Purchase (Sales), Net Capitalized Cost, Software to be Sold, Leased, or Marketed, Accumulated Amortization Capitalized Cost, Software to be Sold, Leased, or Marketed, Accumulated Amortization Allowance for Funds Used During Construction Allowance for Funds Used During Construction [Table Text Block] Allowance for Funds Used During Construction, Capitalized Costs of Debt & Equity Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block] Credit Loss, Financial Instrument [Policy Text Block] Preferred Resource Portfolio Coal-Fired Generation Retirement MW by 2023 Preferred Resource Portfolio Coal-Fired Generation Retirement MW by 2023 Preferred Resource Portfolio Coal-Fired Generation Retirement MW by 2023 Schedule Long-Term Indebtedness Schedule of Debt [Table Text Block] Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Customer [Domain] Customer [Domain] Schedule of Inventory, Current [Table Text Block] Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] First Mortgage Bonds [Member] First Mortgage Bonds [Member] First Mortgage Bonds [Member] Preferred Resource Portfolio Coal-Fired Generation Retirement by 2023 MW test capability Preferred Resource Portfolio Coal-Fired Generation Retirement by 2023 MW test capability Preferred Resource Portfolio Coal-Fired Generation Retirement at Petersburg Units 1 and 2 in 2021 and 2023 MW test capability Customer deposits Contract with Customer, Liability, Current Total current assets Assets, Current Net Consolidated IPALCO Long-term Debt Long-Term Debt, Excluding Current Maturities Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] Finance Lease Balance Sheet Components Finance Lease Balance Sheet Components [Table Text Block] Finance Lease Balance Sheet Components CDPQ [Member] CDPQ [Member] CDPQ [Member] Interest Rate Contract [Member] Interest Rate Contract [Member] Accounts Receivable, after Allowance for Credit Loss, Current Accounts Receivable, after Allowance for Credit Loss, Current $300M Term Loan $300M Term Loan [Member] $300M Term Loan Accumulated deficit Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Current Current [Member] Current Cash paid during the period for: Cash Paid for Interest and Income Taxes [Abstract] Cash Paid For Interest and Income Taxes [Abstract] Temporary Equity, Including Noncontrolling Interest Temporary Equity, Including Noncontrolling Interest Pension Plan [Member] Pension Plan [Member] Proceeds from Issuance of Debt Proceeds from Issuance of Secured Debt Common Stock [Member] Common Stock [Member] Operating Lease, Lease Income [Table Text Block] Operating Lease, Lease Income [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Deferred fuel [Member] Deferred Fuel Costs [Member] Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss) Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss) Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain (Loss) FMB Twenty - five FMB Twenty - five [Member] FMB Twenty - five Cover [Abstract] Cover [Abstract] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] (Deprecated 2025) Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] (Deprecated 2025) Total Future Lease Payments Total Future Lease Payments Total future lease payments under finance leases Environmentally Beneficial Project Expenditure Environmentally Beneficial Project Expenditure Expenditure of $0.325 million on a state-only environmentally beneficial project to preserve local, ecologically-significant lands; and retirement of Units 1 and 2 prior to July 1, 2023. Receivables from Stockholder Advances to Affiliate Derivative Contract [Domain] Derivative Contract [Domain] Receivable [Policy Text Block] Receivable [Policy Text Block] Accounting Standards Update [Domain] Accounting Standards Update [Domain] Foundry Works Energy Storage Project MwH Foundry Works Energy Storage Project MwH Foundry Works Energy Storage Project MwH TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Derivative Liability, Noncurrent Derivative Liability, Noncurrent Intangible Asset, Including Goodwill, after Accumulated Amortization Intangible Asset, Including Goodwill, after Accumulated Amortization Regulatory Asset [Domain] Regulatory Asset [Domain] Three Point Seven Zero Percent Senior Secured Notes [Domain] Three Point Seven Zero Percent Senior Secured Notes [Member] Three Point Seven Zero Percent Senior Secured Notes Intangible Assets, Finite-Lived, Policy Intangible Assets, Finite-Lived, Policy [Policy Text Block] Debt, Current Debt, Current Electricity [Member] Electricity [Member] Equity, Attributable to Noncontrolling Interest Equity, Attributable to Noncontrolling Interest Asset Retirement Obligation, Current Asset Retirement Obligation, Current Lessor, Operating Lease, Payment to be Received, Maturity Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Segments [Axis] Segments [Axis] Other Increase (Decrease) in Other Operating Liabilities Asset Class [Axis] Asset Class [Axis] Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Additional Paid in Capital Additional Paid in Capital Sale of Derivative Instruments Interest Rate Swap Sale of Derivative Instruments Interest Rate Swap Sale of Derivative Instruments Interest Rate Swap Increase (Decrease) in Other Noncurrent Liabilities Increase (Decrease) in Other Noncurrent Liabilities Payments to Acquire Intangible Assets Payments to Acquire Intangible Assets Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Repayments of First Mortgage Bond Repayments of First Mortgage Bond Asset Retirement Obligation, Accretion Expense Asset Retirement Obligation, Accretion Expense Parent Parent [Member] Unrealized Gains Forward Power Contracts Unrealized Gains Forward Power Contracts [Member] Unrealized Gains Forward Power Contracts Income Taxes Receivable, Current Income Taxes Receivable, Current Common shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Schedule Of Defined Benefit Plans Disclosures Schedule of Defined Benefit Plans Disclosures [Table Text Block] Production Costs, Period Cost Oil and Gas, Production Cost, Period Cost Harding Street [Member] Harding Street [Member] Harding Street [Member] Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Temporary Equity, Accounting Treatment Reclassifications of Temporary to Permanent Equity Hedging Designation [Domain] Hedging Designation [Domain] Derivative Financial Instruments, Liabilities Derivative Financial Instruments, Liabilities [Member] Class of Stock [Domain] Class of Stock [Domain] Interest (net of amount capitalized) Interest Paid, Excluding Capitalized Interest, Operating Activity Payments to Acquire Productive Assets Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Extinguishment of Debt, Amount Extinguishment of Debt, Amount Regulatory assets, current Materials and Supplies, Average Cost Materials and supplies, average cost. Interest Rate Cash Flow Hedge Liability at Fair Value Interest Rate Cash Flow Hedge Liability at Fair Value Hedging Designation [Axis] Hedging Designation [Axis] 2030 IPALCO Senior Notes 2030 IPALCO Senior Notes [Member] 2030 IPALCO Senior Notes Credit Facility [Axis] Credit Facility [Axis] Capitalized Cost, Software to be Sold, Leased, or Marketed, before Accumulated Amortization Capitalized Cost, Software to be Sold, Leased, or Marketed, before Accumulated Amortization Assets, Fair Value Disclosure Assets, Fair Value Disclosure Regulatory Matters Schedule of Regulatory Assets and Liabilities [Text Block] Long-term Debt and Lease Obligation Long-Term Debt and Lease Obligation Finance Lease, Liability, to be Paid, Year Five Finance Lease, Liability, to be Paid, Year Five Receivables from Contracts with Customers Receivables from Contracts with Customers [Table Text Block] Receivables from Contracts with Customers Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Eagle Valley [Member] Eagle Valley [Member] Eagle Valley [Member] Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Business Combination, Consideration Transferred, Equity Interest, Type [Domain] Income Taxes Income Tax Disclosure [Text Block] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalent [Table] Accounts payable Accounts Payable, Current Other Segments [Member] Other Operating Segment [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Noncontrolling Interest, Period Increase (Decrease) Noncontrolling Interest, Increase from Business Combination Emissions Allowance Emissions Allowance Emissions Allowance Debt Instrument [Line Items] Debt Instrument [Line Items] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Crossvine Project Crossvine Project Solar MW Crossvine Project Solar MW Allowance for Credit Losses [Table Text Block] Allowance for Credit Losses [Table Text Block] Allowance for credit losses related to accounts receivable. Other Regulatory Assets (Liabilities) Other Regulatory Assets (Liabilities) [Member] Repayments of Short-term Debt Repayments of Short-Term Debt Lessor, Operating Lease, Payment to be Received, Year Five Lessor, Operating Lease, Payment to be Received, Year Five Revision of Prior Period [Axis] Revision of Prior Period [Axis] Foundry Works Project MwH Foundry Works Project MwH Foundry Works Project MwH Cash and cash equivalents Cash and Cash Equivalent Probable Insurance Recoveries Receivables Probable Insurance Recoveries Receivables Receivables for insurance recoveries determined to be probable recorded in "Prepayments and other current assets" and "Other non-current assets" on the accompanying Unaudited Condensed Consolidated Balance Sheets. Debt Instrument, Interest Rate During Period Debt Instrument, Interest Rate During Period Public Utilities, Requested Rate Increase (Decrease), Percentage Public Utilities, Requested Rate Increase (Decrease), Percentage Energy [Axis] Energy [Axis] Revenue [Abstract] Revenue [Abstract] Revenue [Abstract] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Income Taxes Receivable Income Taxes Receivable Earnings from Tax Attributes Earnings from Tax Attributes Earnings from Tax Attributes Depreciation and amortization Depreciation, Depletion and Amortization Unused lines of Credit Unused lines of Credit [Member] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] CURRENT ASSETS: Assets, Current [Abstract] Imputed interest Imputed interest Imputed interest Entity Address, Address Line One Entity Address, Address Line One Income Tax Expense (Benefit) Income Tax Expense (Benefit) Crosstrack Energy Storage Project Crosstrack Energy Storage Project Crosstrack Energy Storage Project Eagle Valley uncollectible outage costs, gross Eagle Valley uncollectible outage costs, gross Eagle Valley uncollectible outage costs, gross Types of Items Hedged by Interest Rate Derivatives (Deprecated 2025) Types of Items Hedged by Interest Rate Derivatives (Deprecated 2025) Variable Interest Entity, Qualitative or Quantitative Information, Nature of VIE Variable Interest Entity, Qualitative or Quantitative Information, Nature of VIE Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Petersburg Energy Storage Project MwH Petersburg Energy Storage Project MwH Petersburg Energy Storage Project MwH Consolidation, Policy [Policy Text Block] Consolidation, Policy [Policy Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Lessor, Operating Lease, Payment to be Received, Year Two Lessor, Operating Lease, Payment to be Received, Year Two Defined Benefit Plan, Amortization of Gain (Loss) Amortization of actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Asset Retirement Obligation, Revision of Estimate Asset Retirement Obligation, Revision of Estimate Fuel Costs Fuel Costs Net income Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Public Utilities, Approved Return on Equity, Percentage Public Utilities, Approved Return on Equity, Percentage Pike Co Bess Project Pike Co Bess Project [Member] Pike Co Bess Project Regulatory Liability, Current Total current regulatory liabilities Regulatory Liability, Current Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax (Deprecated 2025) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax (Deprecated 2025) Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent Derivative Asset, Fair Value, Gross Asset Derivative Asset, Subject to Master Netting Arrangement, before Offset Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount Borrowings under revolving credit facilities Proceeds from Short-Term Debt Contract with Customer, Asset, before Allowance for Credit Loss Contract with Customer, Asset, before Allowance for Credit Loss Other Noncash Investing and Financing Items [Abstract] Other Noncash Investing and Financing Items [Abstract] First Mortgage Bond 6.60% Due January 2034 [Member] First Mortgage Bond Thirteen [Member] First Mortgage Bond Thirteen [Member] Accounts Receivable, Allowance for Credit Loss, Recovery Accounts Receivable, Allowance for Credit Loss, Recovery Petersburg Energy Center Project MW Petersburg Energy Center Project MW Petersburg Energy Center Project MW