v3.26.1
Overview and Summary Of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 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:
 March 31,December 31,
 20262025
 (In Thousands)
Cash, cash equivalents and restricted cash
     Cash and cash equivalents$94,150 $69,834 
     Restricted cash (included in Prepayments and other current assets)5 5 
          Total cash, cash equivalents and restricted cash$94,155 $69,839 
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
The following table summarizes our accounts receivable balances at March 31, 2026 and December 31, 2025:
 March 31,December 31,
 20262025
 (In Thousands)
Accounts receivable, net
     Customer receivables$175,785 $184,471 
     Unbilled revenue
82,175 94,875 
     Amounts due from related parties12,078 8,533 
     Other13,843 22,394 
     Allowance for credit losses(13,049)(14,057)
           Total accounts receivable, net$270,832 $296,216 
Schedule of Inventory, Current [Table Text Block]
The following table summarizes our inventory balances at March 31, 2026 and December 31, 2025:
 March 31,December 31,
 20262025
 (In Thousands)
Inventories
     Fuel$16,727 $21,694 
     Materials and supplies, net50,834 52,089 
          Total inventories$67,561 $73,783 
Schedule of Asset Retirement Obligations [Table Text Block]
Three Months Ended March 31,
 20262025
 (In Thousands)
Balance as of January 1
$573,187 $378,460 
Liabilities incurred— 250 
Liabilities settled(3,405)(1,987)
Revisions to cash flow and timing estimates(4,589)(12,919)
Accretion expense6,363 4,475 
Balance as of March 31$571,556 $368,279 
Less: ARO liabilities, current60,190 45,396 
ARO liabilities, non-current
$511,366 $322,883 
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 March 31,
 20262025
AFUDC equity$1,590 $669 
AFUDC debt$5,671 $9,817 
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:

March 31,
December 31,
$ in thousands
20262025
Capitalized software
$302,186 $297,631 
Project development intangible assets
147,617 145,370 
Other
809 809 
Less: Accumulated amortization
(167,733)(157,850)
Intangible assets - net
$282,879 $285,960 
Three Months Ended March 31,
20262025
Amortization expense
$7,665 $7,669 
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:
Three Months Ended March 31,
$ in Thousands20262025
Allowance for credit losses:
     Beginning balance$14,057 $29,798 
     Current period provision4,042 6,579 
     Write-offs charged against allowance
(5,321)(192)
     Recoveries
271 269 
           Ending Balance$13,049 $36,454