Overview and Summary Of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Receivable [Policy Text Block]

Accounts Receivable and Allowance for Credit Losses

The following table summarizes our accounts receivable balances at March 31, 2024 and December 31, 2023:

	March 31,		December 31,
	2024		2023
	(In Thousands)
Accounts receivable, net
Customer receivables	$	166,812	$	125,715
Unbilled revenue	108,806		91,463
Amounts due from related parties	6,434		5,178
Other	15,373		13,848
Allowance for credit losses	(3,765)		(2,283)
Total accounts receivable, net	$	293,660	$	233,921

Inventory, Policy [Policy Text Block]

The following table is a rollforward of our allowance for credit losses related to the accounts receivable balances for the periods indicated:

	For the Three Months Ended March 31,
$ in Thousands	2024		2023
Allowance for credit losses:
Beginning balance	$	2,283	$	1,117
Current period provision	1,022		983
Write-offs charged against allowance	(159)		(1,522)
Recoveries collected	619		485
Ending Balance	$	3,765	$	1,063

Inventories

The following table summarizes our inventories balances at March 31, 2024 and December 31, 2023:

	March 31,		December 31,
	2024		2023
	(In Thousands)
Inventories
Fuel	$	69,185	$	77,198
Materials and supplies, net	67,820		66,392
Total inventories	$	137,005	$	143,590

Schedule of Asset Retirement Obligations [Table Text Block]

	For the Three Months Ended March 31,
	2024		2023
	(In Thousands)
Balance as of January 1	$	249,930	$	218,729
Liabilities incurred	7,778		69
Liabilities settled	(1,098)		(3,025)
Revisions to cash flow and timing estimates	8,525		—
Accretion expense	2,737		2,639
Balance as of March 31	$	267,872	$	218,412

Consolidation, Policy [Policy Text Block]

Consolidation

The accompanying Financial Statements include the accounts of IPALCO Enterprises, Inc., AES Indiana and Mid-America Capital Resources, Inc., a non-regulated wholly-owned subsidiary of IPALCO. Furthermore, VIEs in which the Company has an ownership interest and is the primary beneficiary, thus controlling the VIE, have been consolidated. All significant intercompany amounts have been eliminated in consolidation.

Use Of Management Estimates

Use of Management Estimates

The preparation of financial statements in conformity with GAAP requires that management make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements. The reported amounts of revenues and expenses during the reporting period may also be affected by the estimates and assumptions management is required to make. Actual results may differ from those estimates. Significant items subject to such estimates and assumptions include: recognition of revenue including unbilled revenue; the carrying value of property, plant and equipment; the valuation of insurance and claims liabilities; the valuation of allowances for credit losses and deferred income taxes; regulatory assets and liabilities; liabilities recorded for income tax exposures; litigation; contingencies; and assets and liabilities related to AROs and employee benefits.

Reclassifications

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Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]

Cash, Cash Equivalents and Restricted Cash

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,
	2024		2023
	(In Thousands)
Cash, cash equivalents and restricted cash
Cash and cash equivalents	$	435,217	$	28,579
Restricted cash (included in Prepayments and other current assets)	5		5
Total cash, cash equivalents and restricted cash	$	435,222	$	28,584

Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts [Policy Text Block]

The following table is a rollforward of our allowance for credit losses related to the accounts receivable balances for the periods indicated:

	For the Three Months Ended March 31,
$ in Thousands	2024		2023
Allowance for credit losses:
Beginning balance	$	2,283	$	1,117
Current period provision	1,022		983
Write-offs charged against allowance	(159)		(1,522)
Recoveries collected	619		485
Ending Balance	$	3,765	$	1,063

Intangible Assets, Finite-Lived, Policy

Intangible Assets

Finite-lived intangible assets primarily include capitalized software and project development intangible assets amortized over their useful lives. These capitalized software and project development intangible assets range from 7 to 35 year-weighted average amortization periods, respectively.

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	2024		2023
Capitalized software	$	265,224	$	261,872
Project development intangible assets	83,940		84,097
Other	797		797
Less: Accumulated amortization	116,963		111,110
Intangible assets - net	$	232,998	$	235,656
	For the Three Months Ended March 31,
	2024		2023
Amortization expense	$	6,940	$	2,987