v3.26.3
Overview and Summary Of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2026
Accounting Policies [Abstract]  
Schedule of Cash and Cash Equivalents [Table Text Block]
The following table provides a summary of cash, cash equivalents and restricted cash amounts reported within the Condensed Consolidated Balance Sheets that reconcile to the total of such amounts as shown on the Condensed Consolidated Statements of Cash Flows:
September 30,December 31,
20262025
(In Thousands)
Cash, cash equivalents and restricted cash
     Cash and cash equivalents$65,918 $69,834 
     Restricted cash (included in Prepayments and other current assets)5 5 
          Total cash, cash equivalents and restricted cash$65,923 $69,839 
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
The following table summarizes our accounts receivable balances at September 30, 2026 and December 31, 2025:
September 30,December 31,
20262025
(In Thousands)
Accounts receivable, net
     Customer receivables$189,172 $184,471 
     Unbilled revenue
92,169 94,875 
     Amounts due from related parties8,944 8,533 
     Other26,247 22,394 
     Allowance for credit losses(12,389)(14,057)
           Total accounts receivable, net$304,143 $296,216 
Schedule of Inventory, Current [Table Text Block]
The following table summarizes our inventory balances at September 30, 2026 and December 31, 2025:
September 30,December 31,
20262025
(In Thousands)
Inventories
     Fuel$3,070 $21,694 
     Materials and supplies, net49,525 52,089 
          Total inventories$52,595 $73,783 
Schedule of Asset Retirement Obligations [Table Text Block]
Nine Months Ended September 30,
20262025
(In Thousands)
Balance as of January 1
$573,187 $378,460 
Liabilities incurred1,539 1,515 
Liabilities settled(22,946)(17,314)
Revisions to cash flow and timing estimates37,844 91,996 
Accretion expense19,225 12,876 
Balance as of September 30$608,849 $467,533 
Less: ARO liabilities, current58,850 44,537 
ARO liabilities, non-current
$549,999 $422,996 
Allowance for Funds Used During Construction
AES Indiana capitalizes an allowance for the net cost of funds (interest on borrowed funds and a reasonable rate of return on equity funds) used for construction purposes during the period of construction with a corresponding credit to income. AFUDC equity and AFUDC debt were as follows for the periods indicated:

$ in thousandsThree Months Ended September 30,Nine Months Ended September 30,
2026202520262025
AFUDC equity$2,204 $622 $5,648 $2,023 
AFUDC debt$6,543 $8,932 $17,691 $25,348 
Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense
Finite-lived intangible assets primarily include capitalized software and project development intangible assets amortized over their useful lives. The following table presents information related to the Company’s intangible assets, including the gross amount capitalized and related amortization:

September 30,
December 31,
$ in thousands
20262025
Capitalized software
$310,950 $297,631 
Project development intangible assets
147,617 145,370 
Other
809 809 
Less: Accumulated amortization
(180,868)(157,850)
Intangible assets - net
$278,508 $285,960 
Three Months Ended September 30,Nine Months Ended September 30,
2026202520262025
Amortization expense
$6,496 $7,419 $20,929 $21,319 
Accounts Receivable, Allowance for Credit Loss
The following table is a rollforward of our allowance for credit losses related to the accounts receivable balances for the periods indicated:
Nine Months Ended September 30,
$ in Thousands20262025
Allowance for credit losses:
     Beginning balance$14,057 $29,798 
     Current period provision15,014 22,718 
     Write-offs charged against allowance
(17,347)(36,395)
     Recoveries
665 356 
           Ending Balance$12,389 $16,477