Ipalco Enterprises 10-Q 6 Nov 20 2020 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2020	Nov. 05, 2020
Entity Information [Line Items]
Document Fiscal Year Focus	2020
Entity Central Index Key	0000728391
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Incorporation, State or Country Code	IN
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2020
Amendment Flag	false
Document Fiscal Period Focus	Q3
Entity Registrant Name	IPALCO ENTERPRISES, INC.
Entity Tax Identification Number	35-1575582
Entity Address, Postal Zip Code	46204
Entity File Number	1-8644
Entity Address, Address Line One	One Monument Circle
Entity Address, City or Town	Indianapolis
Entity Address, State or Province	IN
City Area Code	317
Local Phone Number	261-8261
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Common Stock, Shares, Outstanding		108,907,318
AES U.S. Investments [Member]
Entity Information [Line Items]
Common Stock, Shares, Outstanding		89,685,177
CDPQ [Member]
Entity Information [Line Items]
Common Stock, Shares, Outstanding		19,222,141

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Costs and Expenses	$ 274,101	$ 304,348	$ 810,508	$ 891,346
REVENUES	356,088	398,456	1,024,973	1,121,634
Cost of Revenue [Abstract]
Fuel Costs	73,901	93,217	186,040	254,233
Cost of Goods and Services Sold	26,987	31,840	105,536	101,483
OPERATING EXPENSES:
Utilities Operating Expense, Maintenance and Operations	100,455	105,975	300,703	321,782
Depreciation and amortization	62,359	60,373	184,166	179,939
Taxes other than income taxes	10,399	12,943	34,063	33,909
Operating Income (Loss)	81,987	94,108	214,465	230,288
Allowance for equity funds used during construction	1,099	810	3,116	2,538
Interest Expense	32,741	30,620	96,757	91,393
Other Nonoperating Income (Expense)	935	(2,704)	2,914	(7,977)
Nonoperating Income (Expense)	(30,707)	(32,514)	(93,142)	(96,832)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	51,280	61,594	121,323	133,456
Income Tax Expense (Benefit)	10,981	13,088	25,918	28,252
Net income	40,299	48,506	95,405	105,204
Less: Dividends on preferred stock	803	803	2,410	2,410
Net Income (Loss) Available to Common Stockholders, Basic	39,496	47,703	92,995	102,794
Gain (Loss) on Extinguishment of Debt	0	0	(2,415)	0
OPERATING INCOME	81,987	94,108	214,465	230,288
OTHER INCOME / (EXPENSE), NET:
Allowance for equity funds used during construction	1,099	810	3,116	2,538
Interest Expense	(32,741)	(30,620)	(96,757)	(91,393)
Other Nonoperating Income (Expense)	935	(2,704)	2,914	(7,977)
Total other income / (expense), net	(30,707)	(32,514)	(93,142)	(96,832)
EARNINGS FROM OPERATIONS BEFORE INCOME TAX
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	51,280	61,594	121,323	133,456
Income Tax Expense (Benefit)	10,981	13,088	25,918	28,252
NET INCOME	40,299	48,506	95,405	105,204
Less: Dividends on preferred stock	803	803	2,410	2,410
NET INCOME APPLICABLE TO COMMON STOCK	39,496	47,703	92,995	102,794
Electricity [Member]
REVENUES	$ 356,088	$ 398,456	$ 1,024,973	$ 1,121,634

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	$ (1,278)	$ 4,322	$ 12,632	$ 10,188
Net Income (Loss) Available to Common Stockholders, Basic	39,496	47,703	92,995	102,794
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	3,707	(12,534)	(36,632)	(29,722)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	5,051	(12,534)	(33,944)	(29,722)
Other Comprehensive Income (Loss), Net of Tax	5,051	(12,534)	(33,944)	(29,722)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	44,547	35,169	59,051	73,072
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	1,344	0	2,688	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	$ 463	$ 0	$ 926	$ 0

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 3,520	$ 921
CURRENT ASSETS:
Cash and cash equivalents	38,815	48,152
Restricted Cash and Cash Equivalents	20,513	400
Accounts Receivable, after Allowance for Credit Loss, Current	158,560	161,090
Inventory, Net	95,652	83,569
Regulatory assets	41,663	37,398
Income Taxes Receivable, Current	22,203	23,670
Other Assets, Current	23,424	17,264
Total current assets	400,830	371,543
UTILITY PLANT:
Property, Plant and Equipment, Gross	6,490,135	6,398,612
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	2,533,889	2,414,652
Utility plant in service - net	3,956,246	3,983,960
Construction in Progress, Gross	179,330	130,609
Total net property, plant and equipment	4,135,576	4,114,569
OTHER ASSETS:
Intangible Assets, Net (Excluding Goodwill)	58,099	64,861
Regulatory assets	341,066	355,614
Other assets - net	22,729	22,082
Assets, Noncurrent	421,894	442,557
TOTAL ASSETS	4,958,300	4,928,669
Debt, Current	234,853	559,199
CURRENT LIABILITIES:
Accounts payable	118,392	128,521
Accrued taxes	27,231	22,012
Interest Payable, Current	44,195	35,334
Customer deposits	27,747	34,635
Regulatory Liability, Current	46,871	52,654
Derivative Liability, Current	0	26,560
Accrued Liabilities and Other Liabilities	19,989	23,300
Total current liabilities	519,278	882,215
NON-CURRENT LIABILITIES:
Long-term debt (Note 4)	2,467,139	2,092,430
Deferred income tax liabilities	266,243	272,861
Taxes Payable	7,875	4,658
Regulatory Liability, Noncurrent	836,976	846,430
Accrued pension and other postretirement benefits	14,166	19,344
Asset retirement obligations	199,130	204,219
Other non-current liabilities	226	252
Total non-current liabilities	3,867,579	3,440,194
Liabilities	4,386,857	4,322,409
Common shareholders' equity:
Additional Paid in Capital	589,911	590,784
Accumulated Other Comprehensive Income (Loss), Net of Tax	(53,694)	(19,750)
Accumulated deficit	(24,558)	(24,558)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	511,659	546,476
Cumulative preferred stock of subsidiary	59,784	59,784
Total common shareholders' equity	571,443	606,260
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,958,300	4,928,669
Derivative Liability, Noncurrent	$ 75,824	$ 0

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable and unbilled revenue, allowance for doubtful accounts	$ 3,520	$ 921

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATIONS:
Net income	$ 95,405	$ 105,204
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	184,166	179,939
Amortization of redemption premiums and expense on debt	3,006	3,081
Deferred income taxes and investment tax credit adjustments - net	(2,001)	15,109
Allowance for equity funds used during construction	(3,116)	(2,538)
Gain (Loss) on Extinguishment of Debt	2,415	0
Change in certain assets and liabilities:
Accounts receivable	2,530	(5,117)
Inventories	(16,652)	7,688
Increase (Decrease) in Accounts Payable	(24,228)	(46,063)
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities	(9,041)	3,560
Accrued real estate and personal property taxes	9,904	(9,670)
Accrued interest	8,861	2,965
Pension and other postretirement benefit expenses	(5,179)	4,082
Short-term and long-term regulatory assets and liabilities	828	2,213
Increase (Decrease) in Prepaid Expense and Other Assets	6,159	3,576
Other - net	421	2,895
Net cash provided by operating activities	241,160	259,772
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(149,369)	(126,066)
Project development costs	(1,848)	(1,268)
Cost of removal and regulatory recoverable ARO payments	(29,483)	(14,067)
Other	119	278
Net cash used in investing activities	(180,581)	(141,123)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments for financed capital expenditures	51	5,616
Proceeds from Issuance of Long-term Debt	474,568	0
Repayments of Lines of Credit	(30,000)	(10,000)
Distributions to Shareholders	93,993	94,699
Repayments of Long-term Debt	472,135	0
Payments of Deferred Finance Costs	(5,664)	0
Proceeds from Lines of Credit	80,000	10,000
Repayments of Long-term Debt	(472,135)	0
Preferred dividends of subsidiary	(2,410)	(2,410)
Other	(118)	(710)
Net cash used in financing activities	(49,803)	(103,435)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	10,776	15,214
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	59,328	48,813
Supplemental disclosures of cash flow information:
Capital Expenditures Incurred but Not yet Paid	49,569	13,115
Cash paid during the period for:
Income Taxes Paid, Net	27,000	23,600
Interest (net of amount capitalized)	$ 81,073	$ 85,602

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Common Stockholders' Equity ( Deficit) Statement - USD ($) $ in Thousands	Total	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Cumulative Preferred Stock Of Subsidiary [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 573,266	$ 597,824	$ 0	$ (24,558)	$ 59,784
Other Comprehensive Income (Loss), Net of Tax	(5,539)
Net Income (Loss) Available to Common Stockholders, Basic	40,982
Dividends, Common Stock	(31,590)
Stock Issued During Period, Value, Other	34	34
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	35,443
Preferred Stock Dividends, Income Statement Impact	803
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(803)
Payments of Ordinary Dividends, Common Stock	(31,590)
Other Comprehensive Income (Loss), Net of Tax	(29,722)
Net Income (Loss) Available to Common Stockholders, Basic	102,794
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	73,072
Preferred Stock Dividends, Income Statement Impact	2,410
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(2,410)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	577,153	597,858	(5,539)	(15,166)	59,784
Other Comprehensive Income (Loss), Net of Tax	(11,649)
Net Income (Loss) Available to Common Stockholders, Basic	14,109
Dividends, Common Stock	(28,345)
Stock Issued During Period, Value, Other	59	59
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	2,460
Preferred Stock Dividends, Income Statement Impact	804
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(804)
Payments of Ordinary Dividends, Common Stock	(28,345)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	551,327	597,917	(17,188)	(29,402)	59,784
Other Comprehensive Income (Loss), Net of Tax	(12,534)
Net Income (Loss) Available to Common Stockholders, Basic	47,703
Dividends, Common Stock	(34,764)
Stock Issued During Period, Value, Other	54	54
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	35,169
Preferred Stock Dividends, Income Statement Impact	803
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(803)
Payments of Ordinary Dividends, Common Stock	(34,764)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	551,786	597,971	(29,722)	(16,463)	59,784
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	546,476	590,784	(19,750)	(24,558)	59,784
Other Comprehensive Income (Loss), Net of Tax	(36,313)
Net Income (Loss) Available to Common Stockholders, Basic	35,180
Dividends, Common Stock	(26,631)
Stock Issued During Period, Value, Other	49	49
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(1,133)
Preferred Stock Dividends, Income Statement Impact	803
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(803)
Payments of Ordinary Dividends, Common Stock	(26,631)
Other Comprehensive Income (Loss), Net of Tax	(33,944)
Net Income (Loss) Available to Common Stockholders, Basic	92,995
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	59,051
Preferred Stock Dividends, Income Statement Impact	2,410
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(2,410)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	518,761	590,833	(56,063)	(16,009)	59,784
Other Comprehensive Income (Loss), Net of Tax	(2,682)
Net Income (Loss) Available to Common Stockholders, Basic	18,319
Dividends, Common Stock	(26,596)
Stock Issued During Period, Value, Other	37	37
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	15,637
Preferred Stock Dividends, Income Statement Impact	804
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(804)
Payments of Ordinary Dividends, Common Stock	(26,596)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	507,839	590,870	(58,745)	(24,286)	59,784
Other Comprehensive Income (Loss), Net of Tax	5,051
Net Income (Loss) Available to Common Stockholders, Basic	39,496
Dividends, Common Stock	(40,766)
Stock Issued During Period, Value, Other	39	39
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	44,547
Preferred Stock Dividends, Income Statement Impact	803
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	(803)
Return of Capital		(998)
Payments of Ordinary Dividends, Common Stock	(39,768)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 511,659	$ 589,911	$ (53,694)	$ (24,558)	$ 59,784

Overview and Summary Of Signifi

Overview and Summary Of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Overview and Summary Of Significant Accounting Policies	1. OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES IPALCO is a holding company incorporated under the laws of the state of Indiana. IPALCO is owned by AES U.S. Investments (82.35%) and CDPQ (17.65%). AES U.S. Investments is owned by AES U.S. Holdings, LLC (85%) and CDPQ (15%). IPALCO owns all of the outstanding common stock of IPL. Substantially all of IPALCO’s business consists of generating, transmitting, distributing and selling of electric energy conducted through its principal subsidiary, IPL. IPL was incorporated under the laws of the state of Indiana in 1926. IPL has approximately 510,000 retail customers in the city of Indianapolis and neighboring cities, towns and communities, and adjacent rural areas all within the state of Indiana, with the most distant point being approximately forty miles from Indianapolis. IPL has an exclusive right to provide electric service to those customers. IPL owns and operates four generating stations, all within the state of Indiana. IPL’s largest generating station, Petersburg, is coal-fired. The second largest station, Harding Street, uses natural gas and fuel oil to power combustion turbines. In addition, IPL operates a 20 MW battery energy storage unit at this location, which provides frequency response. The third station, Eagle Valley, is a CCGT natural gas plant. The fourth station, Georgetown, is a small peaking station that uses natural gas to power combustion turbines. As of September 30, 2020, IPL’s net electric generation capacity for winter is 3,705 MW and net summer capacity is 3,560 MW. Principles of Consolidation The accompanying Financial Statements include the accounts of IPALCO, IPL and Mid-America Capital Resources, Inc., a non-regulated wholly-owned subsidiary of IPALCO. All significant intercompany amounts have been eliminated. The accompanying Financial Statements are unaudited; however, they have been prepared in accordance with GAAP for interim financial information and in conjunction with the rules and regulations of the SEC. Accordingly, they do not include all of the disclosures required by GAAP for annual fiscal reporting periods. In the opinion of management, all adjustments of a normal recurring nature necessary for fair presentation have been included. The electric utility business is affected by seasonal weather patterns throughout the year and, therefore, the operating revenues and associated operating expenses are not generated evenly by month during the year. These unaudited Financial Statements have been prepared in accordance with the accounting policies described in IPALCO’s 2019 Form 10-K and should be read in conjunction therewith. 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 that management is required to make. Actual results may differ from those estimates. Cash, Cash Equivalents and Restricted Cash The following table provides a summary of cash, cash equivalents and restricted cash amounts as shown on the Condensed Consolidated Statements of Cash Flows: September 30, December 31, 2020 2019 (In Thousands) Cash, cash equivalents and restricted cash Cash and cash equivalents $ 38,815 $ 48,152 Restricted cash 20,513 400 Total cash, cash equivalents and restricted cash $ 59,328 $ 48,552 Accounts Receivable The following table summarizes our accounts receivable balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Accounts receivable, net Customer receivables $ 97,018 $ 90,747 Unbilled revenue 54,829 65,822 Amounts due from related parties 5,645 2,717 Other 4,588 2,725 Allowance for credit losses (3,520) (921) Total accounts receivable, net $ 158,560 $ 161,090 The following table is a rollforward of our allowance for credit losses related to the accounts receivable balances for the nine months ended September 30, 2020 (in Thousands): Beginning Allowance Balance at January 1, 2020 Current Period Provision Write-offs Charged Against Allowances Recoveries Collected Ending Allowance Balance at Allowance for credit losses $ 921 $ 4,365 $ (5,124) $ 3,358 $ 3,520 The allowance for credit losses primarily relates to utility customer receivables, including unbilled amounts. Expected credit loss estimates are developed by disaggregating customers into those with similar credit risk characteristics and using historical credit loss experience. In addition, we also consider how current and future economic conditions are expected to impact collectability, as applicable, including the economic impacts of the COVID-19 pandemic on our receivable balance as of September 30, 2020. Amounts are written off when reasonable collections efforts have been exhausted. An Executive Order issued by the Governor of Indiana on March 19, 2020 and extended by the IURC prohibited electric utilities, including us, from discontinuing electric utility service to customers through August 14, 2020 due to the economic impacts of COVID-19. This order along with the economic impacts of COVID-19 has resulted in an increase in past due customer receivable balances, and thus the current period provision and the allowance for credit losses has increased during 2020. Please see additional discussion in Note 2, " Regulatory Matters - IURC COVID-19 Orders” a nd Note 12, " Risks and Uncertainties - COVID-19 Pandemic ." Inventories The following table summarizes our inventories balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Inventories Fuel $ 36,154 $ 26,907 Materials and supplies 59,498 56,662 Total inventories $ 95,652 $ 83,569 Accumulated Other Comprehensive Income / (Loss) The amounts reclassified out of Accumulated Other Comprehensive Loss by component during the three and nine months ended September 30, 2020 and 2019 are as follows (in thousands): Details about Accumulated Other Comprehensive Loss components Affected line item in the Condensed Consolidated Statements of Operations Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gains and losses on cash flow hedges (Note 4): Interest expense $ (1,807) $ — $ (3,614) $ — Income tax expense $ 463 $ — $ 926 $ — Total reclassifications for the period, net of income taxes $ (1,344) $ — $ (2,688) $ — The changes in the components of Accumulated Other Comprehensive Income/(Loss) during the nine months ended September 30, 2020 are as follows (in thousands): Gains and losses on cash flow hedges (Note 4): Nine Months Ended September 30, Balance at January 1 $ (19,750) Other comprehensive loss before reclassifications $ (36,632) Amounts reclassified from AOCI to earnings $ 2,688 Balance at September 30 $ (53,694) New Accounting Pronouncements Adopted in 2020 The following table provides a brief description of recent accounting pronouncements that had an impact on the Company’s Financial Statements. Accounting pronouncements not listed below were assessed and determined to be either not applicable or did not have a material impact on the Company’s Financial Statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the Financial Statements upon adoption 2016-13, 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, 2020-02, 2020-03, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments See discussion of the ASU below. January 1, 2020 See impact upon adoption of the standard below. ASC 326 - Financial Instruments - Credit Losses On January 1, 2020, the Company adopted ASC 326 Financial Instruments - Credit Losses and its subsequent corresponding updates ("ASC 326"). The new standard updates the impairment model for financial assets measured at amortized cost, known as the Current Expected Credit Loss ("CECL") model. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities are required to use a new forward-looking "expected loss" model that generally results in the earlier recognition of an allowance for credit losses. For available-for-sale debt securities with unrealized losses, entities measure credit losses as it was done under previous GAAP, except that unrealized losses due to credit-related factors are now recognized as an allowance on the balance sheet with a corresponding adjustment to earnings in the income statement. The Company applied the modified retrospective method of adoption for ASC 326. Under this transition method, the Company applied the transition provisions starting at the date of adoption. The CECL model primarily impacts the calculation of the Company's expected credit losses in gross customer trade accounts receivable. The adoption of ASC 326 and the application of CECL on our trade accounts receivable did not have a material impact on our Financial Statements. New Accounting Pronouncements Issued But Not Yet Effective The following table provides a brief description of recent accounting pronouncements that could have a material impact on the Company’s Financial Statements once adopted. Accounting pronouncements not listed below were assessed and determined to be either not applicable or are expected to have no material impact on the Company’s Financial Statements. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the Financial Statements upon adoption 2020-04, Reference Rate Form (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting The standard provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference to LIBOR or another reference rate expected to be discontinued by reference rate reform. This standard is effective for a limited period of time (March 12, 2020 - December 21, 2022). March 12, 2020 - December 31, 2022 The Company is currently evaluating the impact of adopting the standard on the Financial Statements.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2020
Regulated Operations [Abstract]
Regulatory Matters	2. REGULATORY MATTERS TDSIC On March 4, 2020, the IURC issued an order approving the projects in a seven-year TDSIC Plan for eligible transmission, distribution and storage system improvements totaling $1.2 billion from 2020 through 2027. On June 18, 2020, IPL filed its first annual TDSIC rate adjustment for a return on and of investments through March 31, 2020. On October 14, 2020, the IURC issued an order approving this TDSIC rate adjustment, which will be reflected in rates effective November 2020. FAC and Authorized Annual Jurisdictional Net Operating Income As discussed in Note 2, "Regulatory Matters" of IPALCO's 2019 Form 10-K, in each of the last three calendar years IPL has reported earnings in excess of the authorized level for each of the four quarterly reporting periods in those years, however IPL was not required to reduce its fuel cost recovery because of its Cumulative Deficiencies. During 2020, IPL’s Cumulative Deficiencies were exhausted and thus IPL was required to accrue a regulatory liability of $7.3 million as of September 30, 2020. This is recorded within " Regulatory liabilities, current " on the accompanying Unaudited Condensed Consolidated Balance Sheets and as a reduction to revenue on the Unaudited Condensed Consolidated Statements of Operations. IURC COVID-19 Orders In its June 29, 2020 order, the IURC extended the disconnection moratorium for IURC-jurisdictional utilities through August 14, 2020, which has lapsed. Additionally, the IURC authorized Indiana utilities to use regulatory accounting for any impacts associated with prohibiting utility disconnections, waiver or exclusion of certain utility fees (i.e., late fees, convenience fees, deposits, and reconnection fees), and also required utilities to use expanded payment arrangements to aid customers. The IURC also authorized regulatory accounting treatment for COVID-19 related uncollectible and incremental bad debt expense. On August 12, 2020, the IURC required all jurisdictional utilities to continue offering extended payment arrangements for a minimum of six months to all customers for an additional 60 days, until October 12, 2020, which the IURC again extended through December 31, 2020 for residential customers on October 27, 2020. The IURC also continued to suspend the collection of certain utility fees (late fees, deposits, and disconnection/reconnection fees) from residential customers for an additional 60 days, until October 12, 2020, which has lapsed. Utilities were allowed to resume charging convenience fees as set forth in the rate and charges established in their Commission-approved tariffs. As a result of these orders, IPL has recorded a $5.4 million regulatory asset as of September 30, 2020. Additionally, IPL implemented and extended flexible payment assistance plans to customers during the third quarter of 2020. Phase Two of the IURC investigation is expected to focus on longer-term issues related to COVID-19. Among other things, the issues may include consideration of appropriate methodology to review the reasonableness, necessity, and prudency of any COVID-19-related cost recovery requests in future rate cases. For further discussion on the COVID-19 pandemic, see Note 12, " Risks and Uncertainties - COVID-19 Pandemic

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE The fair value of financial assets and liabilities approximate their reported carrying amounts. The estimated fair values of the Company’s assets and liabilities have been determined using available market information. As these amounts are estimates and based on hypothetical transactions to sell assets or transfer liabilities, the use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. For further information on our valuation techniques and policies, see Note 4, " Fair Value" to IPALCO’s 2019 Form 10-K. Financial Assets VEBA Assets IPALCO has VEBA investments that are to be used to fund certain employee postretirement health care benefit plans. These assets are primarily comprised of open-ended mutual funds, which are valued using the net assets value per unit. These investments are recorded at fair value within " Other non-current assets " on the accompanying Unaudited Condensed Consolidated Balance Sheets and classified as equity securities. All changes to fair value on the VEBA investments are included in income in the period that the changes occur. These changes to fair value were not material for the periods covered by this report. Any unrealized gains or losses are recorded in " Other income / (expense), net " on our Unaudited Condensed Consolidated Statements of Operations. FTRs In connection with IPL’s participation in MISO, in the second quarter of each year IPL is granted financial instruments that can be converted into cash or FTRs based on IPL’s forecasted peak load for the period. FTRs are used in the MISO market to hedge IPL’s exposure to congestion charges, which result from constraints on the transmission system. IPL’s FTRs are valued at the cleared auction prices for FTRs in MISO’s annual auction. Because of the infrequent nature of this valuation, the fair value assigned to the FTRs is considered a Level 3 input under the fair value hierarchy required by ASC 820. An offsetting regulatory liability has been recorded as these revenues or costs will be flowed through to customers through the FAC. As such, there is no impact on our Unaudited Condensed Consolidated Statements of Operations. Financial Liabilities Interest Rate Hedges In March 2019, we entered into forward interest rate hedges, which were amended in April 2020. The interest rate hedges have a combined notional amount of $400.0 million. All changes in the market value of the interest rate hedges are recorded in AOCL. See also Note 4, " Derivative Instruments and Hedging Activities - Cash Flow Hedges " for further information. Recurring Fair Value Measurements The fair value of assets and liabilities at September 30, 2020 and December 31, 2019 measured on a recurring basis and the respective category within the fair value hierarchy for IPALCO was determined as follows: Assets and Liabilities at Fair Value Level 1 Level 2 Level 3 Fair value at September 30, 2020 Based on quoted market prices in active markets Other observable inputs Unobservable inputs (In Thousands) Financial assets: VEBA investments: Money market funds $ 20 $ 20 $ — $ — Mutual funds 3,069 — 3,069 — Total VEBA investments 3,089 20 3,069 — Financial transmission rights 1,132 — — 1,132 Total financial assets measured at fair value $ 4,221 $ 20 $ 3,069 $ 1,132 Financial liabilities: Interest rate hedges $ 75,824 $ — $ 75,824 $ — Total financial liabilities measured at fair value $ 75,824 $ — $ 75,824 $ — Assets and Liabilities at Fair Value Level 1 Level 2 Level 3 Fair value at December 31, 2019 Based on quoted market prices in active markets Other observable inputs Unobservable inputs (In Thousands) Financial assets: VEBA investments: Money market funds $ 25 $ 25 $ — $ — Mutual funds 2,854 — 2,854 — Total VEBA investments 2,879 25 2,854 — Financial transmission rights 864 — — 864 Total financial assets measured at fair value $ 3,743 $ 25 $ 2,854 $ 864 Financial liabilities: Interest rate hedges $ 26,560 $ — $ 26,560 $ — Total financial liabilities measured at fair value $ 26,560 $ — $ 26,560 $ — Financial Instruments not Measured at Fair Value in the Consolidated Balance Sheets Debt The fair value of our outstanding fixed-rate debt has been determined on the basis of the quoted market prices of the specific securities issued and outstanding. In certain circumstances, the market for such securities was inactive and therefore the valuation was adjusted to consider changes in market spreads for similar securities. Accordingly, the purpose of this disclosure is not to approximate the value on the basis of how the debt might be refinanced. The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness (Level 2) for the periods ending: September 30, 2020 December 31, 2019 Face Value Fair Value Face Value Fair Value (In Thousands) Fixed-rate $ 2,593,800 $ 3,187,023 $ 2,523,800 $ 2,876,140 Variable-rate 140,000 140,000 155,000 155,000 Total indebtedness $ 2,733,800 $ 3,327,023 $ 2,678,800 $ 3,031,140 The difference between the face value and the carrying value of this indebtedness consists of the following: • unamortized deferred financing costs of $25.1 million and $20.7 million at September 30, 2020 and December 31, 2019, respectively; and • unamortized discounts of $6.7 million and $6.5 million at September 30, 2020 and December 31, 2019, respectively.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities (Notes)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES For further information on the Company’s derivative and hedge accounting policies, see Note 1, " Overview and Summary of Significant Accounting Policies - Financial Derivatives " and Note 5, " Derivative Instruments and Hedging Activities " to IPALCO’s 2019 Form 10-K. At September 30, 2020 , IPL's outstanding derivative instruments were as follows: Commodity Accounting Treatment (a) Unit Purchases Sales Net Purchases/(Sales) Interest rate hedges Designated USD $ 400,000 $ — $ 400,000 FTRs Not Designated MWh 5,135 — 5,135 (a) Refers to whether the derivative instruments have been designated as a cash flow hedge. Cash Flow Hedges As part of our risk management processes, we identify the relationships between hedging instruments and hedged items, as well as the risk management objective and strategy for undertaking various hedge transactions. The fair values of cash flow hedges determined by current public market prices will continue to fluctuate with changes in market prices up to contract expiration. With the adoption of ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted improvements to Accounting for Hedging Activities effective January 1, 2019, we are no longer required to calculate effectiveness and thus the entire change in the fair value of a hedging instrument is now recorded in other comprehensive income and amounts deferred are reclassified to earnings in the same income statement line as the hedged item in the period in which it settles. In March 2019, IPALCO entered into three forward interest rate swaps to hedge the interest rate risk associated with refinancing the IPALCO 2020 maturities. The three interest rate swaps had a combined notional amount of $400.0 million. In April 2020, we de-designated the swaps as cash flow hedges and froze the AOCL of $72.3 million at the date of de-designation. The interest rate swaps were then amended and re-designated as cash flow hedges to hedge the interest rate risk associated with refinancing the 2024 IPALCO Notes. The amended interest rate swaps have a combined notional amount of $400.0 million and will be settled when the 2024 IPALCO Notes are refinanced. The $72.3 million of AOCL associated with the interest rate swaps through the date of the amendment will be amortized out of AOCL into interest expense over the remaining life of the 2030 IPALCO Notes, while any changes in fair value associated with the amended interest rate swaps will be recognized in AOCL going forward. The following tables provide information on gains or losses recognized in AOCL for the cash flow hedges for the periods indicated: Interest Rate Hedges for the Three Months Ended September 30, $ in thousands (net of tax) 2020 2019 Beginning accumulated derivative loss in AOCL $ (58,745) $ (17,188) Net gains / (losses) associated with current period hedging transactions 3,707 (12,534) Net losses reclassified to interest expense, net of tax 1,344 — Ending accumulated derivative loss in AOCL $ (53,694) $ (29,722) Interest Rate Hedges for the Nine Months Ended September 30, $ in thousands (net of tax) 2020 2019 Beginning accumulated derivative loss in AOCL $ (19,750) $ — Net losses associated with current period hedging transactions (36,632) (29,722) Net losses reclassified to interest expense, net of tax 2,688 — Ending accumulated derivative loss in AOCL $ (53,694) $ (29,722) Loss expected to be reclassified to earnings in the next twelve months $ (5,375) Maximum length of time that we are hedging our exposure to variability in future cash flows related to forecasted transactions (in months) 48 Derivatives Not Designated as Hedge FTRs do not qualify for hedge accounting or the normal purchases and sales exceptions under ASC 815. Accordingly, such contracts are recorded at fair value when acquired and subsequently amortized over the annual period as they are used. FTRs are initially recorded at fair value using the income approach. Certain qualifying derivative instruments have been designated as normal purchases or normal sales contracts, as provided under GAAP. Derivative contracts that have been designated as normal purchases or normal sales under GAAP are not subject to hedge or mark to market accounting and are recognized in the consolidated statements of operations on an accrual basis. When applicable, IPALCO has elected not to offset derivative assets and liabilities and not to offset net derivative positions against the right to reclaim cash collateral pledged (an asset) or the obligation to return cash collateral received (a liability) under derivative agreements. As of September 30, 2020, IPALCO did not have any offsetting positions. The following table summarizes the fair value, balance sheet classification and hedging designation of IPALCO's derivative instruments: Commodity Hedging Designation Balance sheet classification September 30, 2020 December 31, 2019 Financial transmission rights Not a Cash Flow Hedge Prepayments and other current assets $ 1,132 $ 864 Interest rate hedges Cash Flow Hedge Derivative liabilities, current $ — $ 26,560 Interest rate hedges Cash Flow Hedge Derivative liabilities, non-current $ 75,824 $ —

Debt

Debt	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Indebtedness	DEBT Long-Term Debt The following table presents our long-term debt: September 30, December 31, Series Due 2020 2019 (In Thousands) IPL first mortgage bonds: 3.875% (1) August 2021 $ 55,000 $ 55,000 3.875% (1) August 2021 40,000 40,000 3.125% (1) December 2024 40,000 40,000 6.60% January 2034 100,000 100,000 6.05% October 2036 158,800 158,800 6.60% June 2037 165,000 165,000 4.875% November 2041 140,000 140,000 4.65% June 2043 170,000 170,000 4.50% June 2044 130,000 130,000 4.70% September 2045 260,000 260,000 4.05% May 2046 350,000 350,000 4.875% November 2048 105,000 105,000 Unamortized discount – net (6,042) (6,156) Deferred financing costs (16,186) (16,629) Total IPL first mortgage bonds 1,691,572 1,691,015 IPL unsecured debt: Variable - 1.047% (2) December 2020 30,000 30,000 Variable - 1.047% (2) December 2020 60,000 60,000 Deferred financing costs (28) (114) Total IPL unsecured debt 89,972 89,886 Total Long-term Debt – IPL 1,781,544 1,780,901 Long-term Debt – IPALCO: Term Loan July 2020 — 65,000 3.45% Senior Secured Notes July 2020 — 405,000 3.70% Senior Secured Notes September 2024 405,000 405,000 4.25% Senior Secured Notes May 2030 475,000 — Unamortized discount – net (649) (313) Deferred financing costs (8,903) (3,959) Total Long-term Debt – IPALCO 870,448 870,728 Total Consolidated IPALCO Long-term Debt 2,651,992 2,651,629 Less: Current Portion of Long-term Debt 184,853 559,199 Net Consolidated IPALCO Long-term Debt $ 2,467,139 $ 2,092,430 (1) First mortgage bonds issued to the Indiana Finance Authority to secure the loan of proceeds from tax-exempt bonds issued by the Indiana Finance Authority. (2) Unsecured notes issued to the Indiana Finance Authority by IPL to facilitate the loan of proceeds from various tax-exempt notes issued by the Indiana Finance Authority. The notes have a final maturity date of December 2038, but are subject to a mandatory put in December 2020. IPL First Mortgage Bonds IPL has $95 million of 3.875% IPL first mortgage bonds that are due August 1, 2021. Management plans to refinance these first mortgage bonds with new debt. In the event that we are unable to refinance these first mortgage bonds on acceptable terms, IPL has available borrowing capacity on its revolving credit facility that could be used to satisfy the obligation. IPL Unsecured Notes In December 2015, the Indiana Finance Authority issued on behalf of IPL an aggregate principal amount of $90 million of Environmental Facilities Refunding Revenue Notes due December 2038 (Indianapolis Power & Light Company Project). These unsecured notes were issued in two series: $30 million Series 2015A notes and $60 million 2015B notes. These notes were initially purchased by a syndication of banks who will hold the notes until the mandatory put date of December 22, 2020. IPL has classified its outstanding $90 million aggregate principal amount of these unsecured notes as short-term indebtedness as they are due December 2020. Management plans to refinance these unsecured notes with new debt. In the event that we are unable to refinance these unsecured notes on acceptable terms, IPL has available borrowing capacity on its revolving credit facility that could be used to satisfy the obligation. IPALCO’s Senior Secured Notes and Term Loan In April 2020, IPALCO completed the sale of the $475 million aggregate principal amount of 4.25% 2030 IPALCO Notes pursuant to Rule 144A and Regulation S under the Securities Act of 1933, as amended. The 2030 IPALCO Notes were issued pursuant to an Indenture dated April 14, 2020, by and between IPALCO and U.S. Bank, National Association, as trustee. The 2030 IPALCO Notes were priced to the public at 99.909% of the principal amount. Net proceeds to IPALCO were approximately $468.6 million after deducting transaction costs and estimated offering expenses. We used the net proceeds from this offering to retire the $65 million Term Loan on April 14, 2020. The remaining net proceeds, together with cash on hand, were used to redeem the 2020 IPALCO Notes on May 14, 2020, and to pay certain related fees, expenses and make-whole premiums. A loss on early extinguishment of debt of $2.4 million for the 2020 IPALCO Notes is included as a separate line item within " Other Income/(Expense), Net " in the accompanying Unaudited Condensed Consolidated Statements of Operations. The 2030 IPALCO Notes are secured by IPALCO’s pledge of all of the outstanding common stock of IPL. The lien on the pledged shares is shared equally and ratably with IPALCO’s existing senior secured notes. IPALCO has also agreed to register the 2030 IPALCO Notes under the Securities Act by filing an exchange offer registration statement or, under specified circumstances, a shelf registration statement with the SEC pursuant to a Registration Rights Agreement dated April 14, 2020. Line of Credit

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Effective Tax Rate IPALCO’s effective combined state and federal income tax rate was 21.4% and 21.4% for the three and nine months ended September 30, 2020, respectively, as compared to 21.2% and 21.2% for the three and nine months ended September 30, 2019, respectively. These rates are lower than the combined federal and state statutory rate of 25.3% primarily due to the flowthrough of the net tax benefit related to the reversal of excess deferred taxes of IPL, which was partially offset by the net tax expense related to the amortization of allowance for equity funds used during construction.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Benefit Plans	BENEFIT PLANS Pension Expense The following table presents net periodic benefit cost information relating to the Pension Plans combined: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (In Thousands) (In Thousands) Components of net periodic benefit cost: Service cost $ 2,068 $ 1,853 $ 6,204 $ 5,558 Interest cost 5,538 6,836 16,614 20,508 Expected return on plan assets (9,445) (7,477) (28,335) (22,431) Amortization of prior service cost 920 956 2,758 2,869 Amortization of actuarial loss 2,029 2,770 6,086 8,311 Net periodic benefit cost $ 1,110 $ 4,938 $ 3,327 $ 14,815 In addition, IPL provides postretirement health care benefits to certain active or retired employees and the spouses of certain active or retired employees. These postretirement health care benefits and the related unfunded obligation of $6.7 million and $6.4 million at September 30, 2020 and December 31, 2019, respectively, were not material to the Financial Statements in the periods covered by this report.

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES Legal Loss Contingencies IPALCO and IPL are involved in litigation arising in the normal course of business. While the results of such litigation cannot be predicted with certainty, management believes that the final outcome will not have a material adverse effect on IPALCO’s results of operations, financial condition and cash flows. Amounts accrued or expensed for legal or environmental contingencies collectively during the periods covered by this report have not been material to the Financial Statements. Environmental Loss Contingencies We are subject to various federal, state, regional and local environmental protection and health and safety laws and regulations governing, among other things, the generation, storage, handling, use, disposal and transportation of regulated materials, including ash; the use and discharge of water used in generation boilers and for cooling purposes; the emission and discharge of hazardous and other materials into the environment; and the health and safety of our employees. These laws and regulations often require a lengthy and complex process of obtaining and renewing permits and other governmental authorizations from federal, state and local agencies. Violation of these laws, regulations or permits can result in substantial fines, other sanctions, permit revocation and/or facility shutdowns. We cannot provide assurance that we have been or will be at all times in full compliance with such laws, regulations and permits. New Source Review and Other CAA NOVs In October 2009, IPL received a NOV and Finding of Violation from the EPA pursuant to the CAA Section 113(a). The NOV alleged violations of the CAA at IPL’s three primarily coal-fired electric generating facilities at the time, dating back to 1986. The alleged violations primarily pertain to the PSD and non-attainment New Source Review (NSR) requirements under the CAA. In addition, on October 1, 2015, IPL received a NOV from the EPA pursuant to CAA Section 113(a) alleging violations of the CAA, the Indiana SIP, and the Title V operating permit related to alleged particulate matter and opacity violations at IPL Petersburg Unit 3. Also, on February 5, 2016, the EPA issued a NOV pursuant to CAA Section 113(a) alleging violations of PSD, non-attainment NSR and other CAA regulations, the Indiana SIP, and the Title V operating permit at Petersburg Generating Station. On August 31, 2020, IPL reached a settlement with the EPA, the DOJ and IDEM resolving the purported violations of the CAA with respect to IPL's four coal-fired generation units currently operating at IPL's Petersburg location. The settlement agreement includes, among other items, the following requirements: annual caps on NO x and SO 2 emissions and more stringent emissions limits than IPL's current Title V air permit; payment of civil penalties totaling $1.525 million; a $5 million environmental mitigation project consisting of the construction and operation of a new, non-emitting source of generation at the site; 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. If IPL does not meet this retirement obligation, it must install a Selective Non-Catalytic Reduction System (SNCR) on Unit 4. The Settlement Agreement is subject to final review and approval by the U.S. District Court for the Southern District of Indiana, following a 30-day public comment period, which began upon publication in the Federal Register. IPL has a contingent liability recorded related to these New Source Review and other CAA NOV matters.

Business Segment Information (N

Business Segment Information (Notes)	9 Months Ended
	Sep. 30, 2020
Segment Reporting Information [Line Items]
Segment Reporting Disclosure [Text Block]	BUSINESS SEGMENT INFORMATION Operating segments are components of an enterprise that engage in business activities from which it may earn revenues and incur expenses, for which separate financial information is available, and is evaluated regularly by the chief operating decision maker in assessing performance and deciding how to allocate resources. Substantially all of our business consists of the generation, transmission, distribution and sale of electric energy conducted through IPL which is a vertically integrated electric utility. IPALCO’s reportable business segment is its utility segment, with all other nonutility business activities aggregated separately. The “All Other” nonutility category primarily includes the Term Loan, 2020 IPALCO Notes, 2024 IPALCO Notes and 2030 IPALCO Notes; approximately $2.8 million and $6.0 million of cash and cash equivalents as of September 30, 2020 and December 31, 2019, respectively; restricted cash of $20.1 million and $0.0 million as of September 30, 2020 and December 31, 2019, respectively; long-term investments of $3.1 million at September 30, 2020 and December 31, 2019, respectively; long-term liabilities for interest rate hedges of $75.8 million and $26.6 million as of September 30, 2020 and December 31, 2019, respectively; and income taxes and interest related to those items. All other assets represented less than 1% of IPALCO’s total assets as of September 30, 2020 and December 31, 2019. The accounting policies of the identified segment are consistent with those policies and procedures described in the summary of significant accounting policies. The following table provides information about IPALCO’s business segments (in thousands): Three Months Ended Three Months Ended September 30, 2020 September 30, 2019 Utility All Other Total Utility All Other Total Revenues $ 356,088 $ — $ 356,088 $ 398,456 $ — $ 398,456 Depreciation and amortization $ 62,359 $ — $ 62,359 $ 60,373 $ — $ 60,373 Interest expense $ 21,725 $ 11,016 $ 32,741 $ 22,244 $ 8,376 $ 30,620 Earnings/(loss) from operations before income tax $ 62,098 $ (10,818) $ 51,280 $ 69,881 $ (8,287) $ 61,594 Nine Months Ended Nine Months Ended September 30, 2020 September 30, 2019 Utility All Other Total Utility All Other Total Revenues $ 1,024,973 $ — $ 1,024,973 $ 1,121,634 $ — $ 1,121,634 Depreciation and amortization $ 184,166 $ — $ 184,166 $ 179,939 $ — $ 179,939 Interest expense $ 65,527 $ 31,230 $ 96,757 $ 66,757 $ 24,636 $ 91,393 Earnings/(loss) from operations before income tax $ 155,835 $ (34,512) $ 121,323 $ 158,153 $ (24,697) $ 133,456 Capital expenditures (1) $ 149,420 $ — $ 149,420 $ 131,682 $ — $ 131,682 As of September 30, 2020 As of December 31, 2019 Utility All Other Total Utility All Other Total Total assets $ 4,942,923 $ 15,377 $ 4,958,300 $ 4,918,408 $ 10,261 $ 4,928,669 (1) Capital expenditures includes payments for financed capital expenditures of $0.1 million and $5.6 million for the nine months ended September 30, 2020 and September 30, 2019, respectively.

Revenue (Notes)

Revenue (Notes)	9 Months Ended
	Sep. 30, 2020
Revenue from External Customer [Line Items]
Revenue from Contract with Customer [Text Block]	REVENUE Revenue is primarily earned from retail and wholesale electricity sales and electricity transmission and distribution delivery services. Revenue is recognized upon transfer of control of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Revenue is recorded net of any taxes assessed on and collected from customers, which are remitted to the governmental authorities. Please see Note 13, “Revenue” to IPALCO’s 2019 Form 10-K for further discussion of our retail, wholesale and miscellaneous revenues. IPL’s revenue from contracts with customers was $350.5 million for the three months ended September 30, 2020 and $391.5 million for the three months ended September 30, 2019, respectively, and $1,004.8 million for the nine months ended September 30, 2020 and $1,100.4 million for the nine months ended September 30, 2019, respectively. The following table presents our revenue from contracts with customers and other revenue (in thousands): For the Three Months Ended For the Three Months Ended September 30, 2020 September 30, 2019 Retail Revenues Retail revenue from contracts with customers: Residential $ 145,407 $ 155,670 Small commercial and industrial 50,023 56,192 Large commercial and industrial 127,884 151,816 Public lighting 2,268 2,403 Other (1) 3,875 3,864 Total retail revenue from contracts with customers 329,457 369,945 Alternative revenue programs 5,225 6,478 Wholesale Revenues Wholesale revenue from contracts with customers: 17,667 18,426 Miscellaneous Revenues Transmission and other revenue from contracts with customers 3,331 3,091 Other miscellaneous revenues (2) 408 516 Total Revenues $ 356,088 $ 398,456 (1) Other retail revenue from contracts with customers includes miscellaneous charges to customers (2) Other miscellaneous revenue includes lease and other miscellaneous revenues not accounted for under ASC 606 For the Nine Months Ended For the Nine Months Ended September 30, 2020 September 30, 2019 Retail Revenues Retail revenue from contracts with customers: Residential $ 428,568 $ 450,864 Small commercial and industrial 147,678 165,961 Large commercial and industrial 369,224 424,348 Public lighting 6,881 4,893 Other (1) 10,568 10,372 Total retail revenue from contracts with customers 962,919 1,056,438 Alternative revenue programs 18,910 19,069 Wholesale Revenues Wholesale revenue from contracts with customers: 33,476 35,533 Miscellaneous Revenues Transmission and other revenue from contracts with customers 8,392 8,474 Other miscellaneous revenues (2) 1,276 2,120 Total Revenues $ 1,024,973 $ 1,121,634 (1) Other retail revenue from contracts with customers includes miscellaneous charges to customers (2) Other miscellaneous revenue includes lease and other miscellaneous revenues not accounted for under ASC 606 The balances of receivables from contracts with customers were $151.7 million and $155.0 million as of September 30, 2020 and December 31, 2019, respectively. Payment terms for all receivables from contracts with customers typically do not extend beyond 30 days, though see Note 2, "Regulatory Matters - IURC COVID-19 Orders" for a discussion of the June 29, 2020 and August 12, 2020 IURC orders requiring expanded payment arrangements for customers. Contract Balances — The timing of revenue recognition, billings, and cash collections results in accounts receivable and contract liabilities. The contract liabilities from contracts with customers were $0.8 million as of September 30, 2020. During the three and nine months ended September 30, 2020, we recognized revenue of $0.3 million and $1.0 million related to this contract liability balance, respectively.

Leases (Notes)

Leases (Notes)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lessor, Leases [Policy Text Block]	LEASES LESSEE The Company enters into long-term non-cancelable lease arrangements which are classified as either operating or finance leases; however, lease balances were not material to the Financial Statements in the periods covered by this report. LESSOR The Company is the lessor under operating leases for land, office space and operating equipment. Minimum lease payments from such contracts are recognized as operating lease revenue on a straight-line basis over the lease term whereas contingent rentals are recognized when earned. Lease revenue included in the Unaudited Condensed Consolidated Statements of Operations was $0.2 million for the three months ended September 30, 2020 and 2019, respectively, and was $0.7 million for the nine months ended September 30, 2020 and 2019, respectively. Underlying gross assets and accumulated depreciation of operating leases included in Total net property, plant and equipment on the Unaudited Condensed Consolidated Balance Sheet were $4.4 million and $0.8 million, respectively, as of September 30, 2020 and $4.3 million and $0.7 million, respectively, as of December 31, 2019. The option to extend or terminate a lease is based on customary early termination provisions in the contract. The Company has not recognized any early terminations as of September 30, 2020. The following table shows the future minimum lease receipts as of September 30, 2020 for the remainder of 2020 through 2024 and thereafter (in thousands): Operating Leases 2020 $ 222 2021 886 2022 906 2023 906 2024 786 Thereafter 2,628 Total $ 6,334

Risks and Uncertainties (Notes)

Risks and Uncertainties (Notes)	9 Months Ended
	Sep. 30, 2020
Risks and Uncertainties [Abstract]
Risks and Uncertainties	RISKS AND UNCERTAINTIES COVID-19 Pandemic The COVID-19 pandemic has severely impacted global economic activity, including electricity and energy consumption, and caused significant volatility and negative pressure in financial markets. The global impact of the outbreak has been rapidly evolving and many countries, including the U.S., have reacted by instituting quarantines, mandating business and school closures and social distancing measures as well as restricting travel. The State of Indiana implemented, among other things, stay-at-home and other social distancing measures to slow the spread of the virus, which has impacted energy demand within our service territory, though the stay-at-home restrictions have now been lifted in our service territory. Also, the Executive Order previously issued by the Governor of Indiana prohibiting electric utilities, including us, from discontinuing electric utility service to customers through August 14, 2020 has lapsed. We are taking a variety of measures in response to the spread of COVID-19 to ensure our ability to generate, transmit, distribute and sell electric energy, ensure the health and safety of our employees, contractors, customers and communities and provide essential services to the communities in which we operate. In addition to the impacts to demand within our service territory, we also have incurred and expect to continue to incur expenses relating to COVID-19, and such expenses may include those that relate to events outside of our control. As the economic impact of the COVID-19 pandemic started to materialize in Indiana in the second half of March and continued in the second and third quarters of 2020, the COVID-19 pandemic primarily impacted our retail sales demand as shown by the changes in weather-normalized volumes of kWh sold: Customer class For the three months ended September 30, 2020 compared to the same period in 2019 For the six months ended September 30, 2020 compared to the same period in 2019 (1) For the nine months ended September 30, 2020 compared to the same period in 2019 Residential 3.9 % 5.1 % 3.7 % Small commercial and industrial (4.2) % (7.0) % (5.1) % Large commercial and industrial (7.9) % (9.3) % (7.3) % 1) This period most closely approximates the duration of the economic impact on our sales demand as a result of the COVID-19 pandemic. We also have incurred and expect to continue to incur expenses relating to COVID-19, however see Note 2, "Regulatory Matters - IURC COVID-19 Order" for a discussion of regulatory measures which partially mitigate the impact of these expenses. The magnitude and duration of the COVID-19 pandemic is unknown at this time and may have material and adverse effects on our results of operations, financial condition and cash flows in future periods.

Overview and Summary Of Signi_2

Overview and Summary Of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Receivable [Policy Text Block]	Accounts Receivable The following table summarizes our accounts receivable balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Accounts receivable, net Customer receivables $ 97,018 $ 90,747 Unbilled revenue 54,829 65,822 Amounts due from related parties 5,645 2,717 Other 4,588 2,725 Allowance for credit losses (3,520) (921) Total accounts receivable, net $ 158,560 $ 161,090
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 nine months ended September 30, 2020 (in Thousands): Beginning Allowance Balance at January 1, 2020 Current Period Provision Write-offs Charged Against Allowances Recoveries Collected Ending Allowance Balance at Allowance for credit losses $ 921 $ 4,365 $ (5,124) $ 3,358 $ 3,520 The allowance for credit losses primarily relates to utility customer receivables, including unbilled amounts. Expected credit loss estimates are developed by disaggregating customers into those with similar credit risk characteristics and using historical credit loss experience. In addition, we also consider how current and future economic conditions are expected to impact collectability, as applicable, including the economic impacts of the COVID-19 pandemic on our receivable balance as of September 30, 2020. Amounts are written off when reasonable collections efforts have been exhausted. An Executive Order issued by the Governor of Indiana on March 19, 2020 and extended by the IURC prohibited electric utilities, including us, from discontinuing electric utility service to customers through August 14, 2020 due to the economic impacts of COVID-19. This order along with the economic impacts of COVID-19 has resulted in an increase in past due customer receivable balances, and thus the current period provision and the allowance for credit losses has increased during 2020. Please see additional discussion in Note 2, " Regulatory Matters - IURC COVID-19 Orders” a nd Note 12, " Risks and Uncertainties - COVID-19 Pandemic ." Inventories The following table summarizes our inventories balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Inventories Fuel $ 36,154 $ 26,907 Materials and supplies 59,498 56,662 Total inventories $ 95,652 $ 83,569
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The accompanying Financial Statements include the accounts of IPALCO, IPL and Mid-America Capital Resources, Inc., a non-regulated wholly-owned subsidiary of IPALCO. All significant intercompany amounts have been eliminated. The accompanying Financial Statements are unaudited; however, they have been prepared in accordance with GAAP for interim financial information and in conjunction with the rules and regulations of the SEC. Accordingly, they do not include all of the disclosures required by GAAP for annual fiscal reporting periods. In the opinion of management, all adjustments of a normal recurring nature necessary for fair presentation have been included. The electric utility business is affected by seasonal weather patterns throughout the year and, therefore, the operating revenues and associated operating expenses are not generated evenly by month during the year. These unaudited Financial Statements have been prepared in accordance with the accounting policies described in IPALCO’s 2019 Form 10-K and should be read in conjunction therewith.
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 that management is required to make. Actual results may differ from those estimates.
Reclassifications	.
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 as shown on the Condensed Consolidated Statements of Cash Flows: September 30, December 31, 2020 2019 (In Thousands) Cash, cash equivalents and restricted cash Cash and cash equivalents $ 38,815 $ 48,152 Restricted cash 20,513 400 Total cash, cash equivalents and restricted cash $ 59,328 $ 48,552
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The changes in the components of Accumulated Other Comprehensive Income/(Loss) during the nine months ended September 30, 2020 are as follows (in thousands): Gains and losses on cash flow hedges (Note 4): Nine Months Ended September 30, Balance at January 1 $ (19,750) Other comprehensive loss before reclassifications $ (36,632) Amounts reclassified from AOCI to earnings $ 2,688 Balance at September 30 $ (53,694)
New Accounting Pronouncements	New Accounting Pronouncements Adopted in 2020 The following table provides a brief description of recent accounting pronouncements that had an impact on the Company’s Financial Statements. Accounting pronouncements not listed below were assessed and determined to be either not applicable or did not have a material impact on the Company’s Financial Statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the Financial Statements upon adoption 2016-13, 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, 2020-02, 2020-03, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments See discussion of the ASU below. January 1, 2020 See impact upon adoption of the standard below. ASC 326 - Financial Instruments - Credit Losses On January 1, 2020, the Company adopted ASC 326 Financial Instruments - Credit Losses and its subsequent corresponding updates ("ASC 326"). The new standard updates the impairment model for financial assets measured at amortized cost, known as the Current Expected Credit Loss ("CECL") model. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities are required to use a new forward-looking "expected loss" model that generally results in the earlier recognition of an allowance for credit losses. For available-for-sale debt securities with unrealized losses, entities measure credit losses as it was done under previous GAAP, except that unrealized losses due to credit-related factors are now recognized as an allowance on the balance sheet with a corresponding adjustment to earnings in the income statement. The Company applied the modified retrospective method of adoption for ASC 326. Under this transition method, the Company applied the transition provisions starting at the date of adoption. The CECL model primarily impacts the calculation of the Company's expected credit losses in gross customer trade accounts receivable. The adoption of ASC 326 and the application of CECL on our trade accounts receivable did not have a material impact on our Financial Statements. New Accounting Pronouncements Issued But Not Yet Effective The following table provides a brief description of recent accounting pronouncements that could have a material impact on the Company’s Financial Statements once adopted. Accounting pronouncements not listed below were assessed and determined to be either not applicable or are expected to have no material impact on the Company’s Financial Statements. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the Financial Statements upon adoption 2020-04, Reference Rate Form (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting The standard provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference to LIBOR or another reference rate expected to be discontinued by reference rate reform. This standard is effective for a limited period of time (March 12, 2020 - December 21, 2022). March 12, 2020 - December 31, 2022 The Company is currently evaluating the impact of adopting the standard on the Financial Statements.
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 nine months ended September 30, 2020 (in Thousands): Beginning Allowance Balance at January 1, 2020 Current Period Provision Write-offs Charged Against Allowances Recoveries Collected Ending Allowance Balance at Allowance for credit losses $ 921 $ 4,365 $ (5,124) $ 3,358 $ 3,520 The allowance for credit losses primarily relates to utility customer receivables, including unbilled amounts. Expected credit loss estimates are developed by disaggregating customers into those with similar credit risk characteristics and using historical credit loss experience. In addition, we also consider how current and future economic conditions are expected to impact collectability, as applicable, including the economic impacts of the COVID-19 pandemic on our receivable balance as of September 30, 2020. Amounts are written off when reasonable collections efforts have been exhausted. An Executive Order issued by the Governor of Indiana on March 19, 2020 and extended by the IURC prohibited electric utilities, including us, from discontinuing electric utility service to customers through August 14, 2020 due to the economic impacts of COVID-19. This order along with the economic impacts of COVID-19 has resulted in an increase in past due customer receivable balances, and thus the current period provision and the allowance for credit losses has increased during 2020. Please see additional discussion in Note 2, " Regulatory Matters - IURC COVID-19 Orders” a nd Note 12, " Risks and Uncertainties - COVID-19 Pandemic ."

Leases, Codification Topic 842

Leases, Codification Topic 842 (Policies)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Lessor, Leases [Policy Text Block]	LEASES LESSEE The Company enters into long-term non-cancelable lease arrangements which are classified as either operating or finance leases; however, lease balances were not material to the Financial Statements in the periods covered by this report. LESSOR The Company is the lessor under operating leases for land, office space and operating equipment. Minimum lease payments from such contracts are recognized as operating lease revenue on a straight-line basis over the lease term whereas contingent rentals are recognized when earned. Lease revenue included in the Unaudited Condensed Consolidated Statements of Operations was $0.2 million for the three months ended September 30, 2020 and 2019, respectively, and was $0.7 million for the nine months ended September 30, 2020 and 2019, respectively. Underlying gross assets and accumulated depreciation of operating leases included in Total net property, plant and equipment on the Unaudited Condensed Consolidated Balance Sheet were $4.4 million and $0.8 million, respectively, as of September 30, 2020 and $4.3 million and $0.7 million, respectively, as of December 31, 2019. The option to extend or terminate a lease is based on customary early termination provisions in the contract. The Company has not recognized any early terminations as of September 30, 2020. The following table shows the future minimum lease receipts as of September 30, 2020 for the remainder of 2020 through 2024 and thereafter (in thousands): Operating Leases 2020 $ 222 2021 886 2022 906 2023 906 2024 786 Thereafter 2,628 Total $ 6,334

Overview and Summary Of Signi_3

Overview and Summary Of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2020
Accounting Policies [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The following table summarizes our accounts receivable balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Accounts receivable, net Customer receivables $ 97,018 $ 90,747 Unbilled revenue 54,829 65,822 Amounts due from related parties 5,645 2,717 Other 4,588 2,725 Allowance for credit losses (3,520) (921) Total accounts receivable, net $ 158,560 $ 161,090
Allowance for Credit Losses [Table Text Block]	The following table is a rollforward of our allowance for credit losses related to the accounts receivable balances for the nine months ended September 30, 2020 (in Thousands): Beginning Allowance Balance at January 1, 2020 Current Period Provision Write-offs Charged Against Allowances Recoveries Collected Ending Allowance Balance at Allowance for credit losses $ 921 $ 4,365 $ (5,124) $ 3,358 $ 3,520
Schedule of Inventory, Current [Table Text Block]	The following table summarizes our inventories balances at September 30, 2020 and December 31, 2019: September 30, December 31, 2020 2019 (In Thousands) Inventories Fuel $ 36,154 $ 26,907 Materials and supplies 59,498 56,662 Total inventories $ 95,652 $ 83,569
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The changes in the components of Accumulated Other Comprehensive Income/(Loss) during the nine months ended September 30, 2020 are as follows (in thousands): Gains and losses on cash flow hedges (Note 4): Nine Months Ended September 30, Balance at January 1 $ (19,750) Other comprehensive loss before reclassifications $ (36,632) Amounts reclassified from AOCI to earnings $ 2,688 Balance at September 30 $ (53,694)
Schedule of Cash and Cash Equivalents [Table Text Block]	The following table provides a summary of cash, cash equivalents and restricted cash amounts as shown on the Condensed Consolidated Statements of Cash Flows: September 30, December 31, 2020 2019 (In Thousands) Cash, cash equivalents and restricted cash Cash and cash equivalents $ 38,815 $ 48,152 Restricted cash 20,513 400 Total cash, cash equivalents and restricted cash $ 59,328 $ 48,552
Reclassification out of Accumulated Other Comprehensive Income	The amounts reclassified out of Accumulated Other Comprehensive Loss by component during the three and nine months ended September 30, 2020 and 2019 are as follows (in thousands): Details about Accumulated Other Comprehensive Loss components Affected line item in the Condensed Consolidated Statements of Operations Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Gains and losses on cash flow hedges (Note 4): Interest expense $ (1,807) $ — $ (3,614) $ — Income tax expense $ 463 $ — $ 926 $ — Total reclassifications for the period, net of income taxes $ (1,344) $ — $ (2,688) $ —

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The fair value of assets and liabilities at September 30, 2020 and December 31, 2019 measured on a recurring basis and the respective category within the fair value hierarchy for IPALCO was determined as follows: Assets and Liabilities at Fair Value Level 1 Level 2 Level 3 Fair value at September 30, 2020 Based on quoted market prices in active markets Other observable inputs Unobservable inputs (In Thousands) Financial assets: VEBA investments: Money market funds $ 20 $ 20 $ — $ — Mutual funds 3,069 — 3,069 — Total VEBA investments 3,089 20 3,069 — Financial transmission rights 1,132 — — 1,132 Total financial assets measured at fair value $ 4,221 $ 20 $ 3,069 $ 1,132 Financial liabilities: Interest rate hedges $ 75,824 $ — $ 75,824 $ — Total financial liabilities measured at fair value $ 75,824 $ — $ 75,824 $ — Assets and Liabilities at Fair Value Level 1 Level 2 Level 3 Fair value at December 31, 2019 Based on quoted market prices in active markets Other observable inputs Unobservable inputs (In Thousands) Financial assets: VEBA investments: Money market funds $ 25 $ 25 $ — $ — Mutual funds 2,854 — 2,854 — Total VEBA investments 2,879 25 2,854 — Financial transmission rights 864 — — 864 Total financial assets measured at fair value $ 3,743 $ 25 $ 2,854 $ 864 Financial liabilities: Interest rate hedges $ 26,560 $ — $ 26,560 $ — Total financial liabilities measured at fair value $ 26,560 $ — $ 26,560 $ —
Schedule Of Face And Fair Value Of Debt	The following table shows the face value and the fair value of fixed-rate and variable-rate indebtedness (Level 2) for the periods ending: September 30, 2020 December 31, 2019 Face Value Fair Value Face Value Fair Value (In Thousands) Fixed-rate $ 2,593,800 $ 3,187,023 $ 2,523,800 $ 2,876,140 Variable-rate 140,000 140,000 155,000 155,000 Total indebtedness $ 2,733,800 $ 3,327,023 $ 2,678,800 $ 3,031,140

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2020
Derivative Instruments and Hedging Activities [Abstract]
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]	The following tables provide information on gains or losses recognized in AOCL for the cash flow hedges for the periods indicated: Interest Rate Hedges for the Three Months Ended September 30, $ in thousands (net of tax) 2020 2019 Beginning accumulated derivative loss in AOCL $ (58,745) $ (17,188) Net gains / (losses) associated with current period hedging transactions 3,707 (12,534) Net losses reclassified to interest expense, net of tax 1,344 — Ending accumulated derivative loss in AOCL $ (53,694) $ (29,722) Interest Rate Hedges for the Nine Months Ended September 30, $ in thousands (net of tax) 2020 2019 Beginning accumulated derivative loss in AOCL $ (19,750) $ — Net losses associated with current period hedging transactions (36,632) (29,722) Net losses reclassified to interest expense, net of tax 2,688 — Ending accumulated derivative loss in AOCL $ (53,694) $ (29,722) Loss expected to be reclassified to earnings in the next twelve months $ (5,375) Maximum length of time that we are hedging our exposure to variability in future cash flows related to forecasted transactions (in months) 48
Schedule of Derivative Instruments [Table Text Block]	At September 30, 2020 , IPL's outstanding derivative instruments were as follows: Commodity Accounting Treatment (a) Unit Purchases Sales Net Purchases/(Sales) Interest rate hedges Designated USD $ 400,000 $ — $ 400,000 FTRs Not Designated MWh 5,135 — 5,135 (a) Refers to whether the derivative instruments have been designated as a cash flow hedge.

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule Long-Term Indebtedness	The following table presents our long-term debt: September 30, December 31, Series Due 2020 2019 (In Thousands) IPL first mortgage bonds: 3.875% (1) August 2021 $ 55,000 $ 55,000 3.875% (1) August 2021 40,000 40,000 3.125% (1) December 2024 40,000 40,000 6.60% January 2034 100,000 100,000 6.05% October 2036 158,800 158,800 6.60% June 2037 165,000 165,000 4.875% November 2041 140,000 140,000 4.65% June 2043 170,000 170,000 4.50% June 2044 130,000 130,000 4.70% September 2045 260,000 260,000 4.05% May 2046 350,000 350,000 4.875% November 2048 105,000 105,000 Unamortized discount – net (6,042) (6,156) Deferred financing costs (16,186) (16,629) Total IPL first mortgage bonds 1,691,572 1,691,015 IPL unsecured debt: Variable - 1.047% (2) December 2020 30,000 30,000 Variable - 1.047% (2) December 2020 60,000 60,000 Deferred financing costs (28) (114) Total IPL unsecured debt 89,972 89,886 Total Long-term Debt – IPL 1,781,544 1,780,901 Long-term Debt – IPALCO: Term Loan July 2020 — 65,000 3.45% Senior Secured Notes July 2020 — 405,000 3.70% Senior Secured Notes September 2024 405,000 405,000 4.25% Senior Secured Notes May 2030 475,000 — Unamortized discount – net (649) (313) Deferred financing costs (8,903) (3,959) Total Long-term Debt – IPALCO 870,448 870,728 Total Consolidated IPALCO Long-term Debt 2,651,992 2,651,629 Less: Current Portion of Long-term Debt 184,853 559,199 Net Consolidated IPALCO Long-term Debt $ 2,467,139 $ 2,092,430 (1) First mortgage bonds issued to the Indiana Finance Authority to secure the loan of proceeds from tax-exempt bonds issued by the Indiana Finance Authority.

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Schedule Of Net Periodic Benefit Costs	The following table presents net periodic benefit cost information relating to the Pension Plans combined: For the Three Months Ended For the Nine Months Ended September 30, September 30, 2020 2019 2020 2019 (In Thousands) (In Thousands) Components of net periodic benefit cost: Service cost $ 2,068 $ 1,853 $ 6,204 $ 5,558 Interest cost 5,538 6,836 16,614 20,508 Expected return on plan assets (9,445) (7,477) (28,335) (22,431) Amortization of prior service cost 920 956 2,758 2,869 Amortization of actuarial loss 2,029 2,770 6,086 8,311 Net periodic benefit cost $ 1,110 $ 4,938 $ 3,327 $ 14,815

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following table provides information about IPALCO’s business segments (in thousands): Three Months Ended Three Months Ended September 30, 2020 September 30, 2019 Utility All Other Total Utility All Other Total Revenues $ 356,088 $ — $ 356,088 $ 398,456 $ — $ 398,456 Depreciation and amortization $ 62,359 $ — $ 62,359 $ 60,373 $ — $ 60,373 Interest expense $ 21,725 $ 11,016 $ 32,741 $ 22,244 $ 8,376 $ 30,620 Earnings/(loss) from operations before income tax $ 62,098 $ (10,818) $ 51,280 $ 69,881 $ (8,287) $ 61,594 Nine Months Ended Nine Months Ended September 30, 2020 September 30, 2019 Utility All Other Total Utility All Other Total Revenues $ 1,024,973 $ — $ 1,024,973 $ 1,121,634 $ — $ 1,121,634 Depreciation and amortization $ 184,166 $ — $ 184,166 $ 179,939 $ — $ 179,939 Interest expense $ 65,527 $ 31,230 $ 96,757 $ 66,757 $ 24,636 $ 91,393 Earnings/(loss) from operations before income tax $ 155,835 $ (34,512) $ 121,323 $ 158,153 $ (24,697) $ 133,456 Capital expenditures (1) $ 149,420 $ — $ 149,420 $ 131,682 $ — $ 131,682 As of September 30, 2020 As of December 31, 2019 Utility All Other Total Utility All Other Total Total assets $ 4,942,923 $ 15,377 $ 4,958,300 $ 4,918,408 $ 10,261 $ 4,928,669

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Table Text Block]	The following table presents our revenue from contracts with customers and other revenue (in thousands): For the Three Months Ended For the Three Months Ended September 30, 2020 September 30, 2019 Retail Revenues Retail revenue from contracts with customers: Residential $ 145,407 $ 155,670 Small commercial and industrial 50,023 56,192 Large commercial and industrial 127,884 151,816 Public lighting 2,268 2,403 Other (1) 3,875 3,864 Total retail revenue from contracts with customers 329,457 369,945 Alternative revenue programs 5,225 6,478 Wholesale Revenues Wholesale revenue from contracts with customers: 17,667 18,426 Miscellaneous Revenues Transmission and other revenue from contracts with customers 3,331 3,091 Other miscellaneous revenues (2) 408 516 Total Revenues $ 356,088 $ 398,456 (1) Other retail revenue from contracts with customers includes miscellaneous charges to customers (2) Other miscellaneous revenue includes lease and other miscellaneous revenues not accounted for under ASC 606 For the Nine Months Ended For the Nine Months Ended September 30, 2020 September 30, 2019 Retail Revenues Retail revenue from contracts with customers: Residential $ 428,568 $ 450,864 Small commercial and industrial 147,678 165,961 Large commercial and industrial 369,224 424,348 Public lighting 6,881 4,893 Other (1) 10,568 10,372 Total retail revenue from contracts with customers 962,919 1,056,438 Alternative revenue programs 18,910 19,069 Wholesale Revenues Wholesale revenue from contracts with customers: 33,476 35,533 Miscellaneous Revenues Transmission and other revenue from contracts with customers 8,392 8,474 Other miscellaneous revenues (2) 1,276 2,120 Total Revenues $ 1,024,973 $ 1,121,634 (1) Other retail revenue from contracts with customers includes miscellaneous charges to customers (2) Other miscellaneous revenue includes lease and other miscellaneous revenues not accounted for under ASC 606

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2020
Leases [Abstract]
Operating Lease, Lease Income [Table Text Block]	The following table shows the future minimum lease receipts as of September 30, 2020 for the remainder of 2020 through 2024 and thereafter (in thousands): Operating Leases 2020 $ 222 2021 886 2022 906 2023 906 2024 786 Thereafter 2,628 Total $ 6,334

Risks and Uncertainties (Tables

Risks and Uncertainties (Tables)	9 Months Ended
	Sep. 30, 2020
Risks and Uncertainties [Abstract]
Unusual Risks and Uncertainties	As the economic impact of the COVID-19 pandemic started to materialize in Indiana in the second half of March and continued in the second and third quarters of 2020, the COVID-19 pandemic primarily impacted our retail sales demand as shown by the changes in weather-normalized volumes of kWh sold: Customer class For the three months ended September 30, 2020 compared to the same period in 2019 For the six months ended September 30, 2020 compared to the same period in 2019 (1) For the nine months ended September 30, 2020 compared to the same period in 2019 Residential 3.9 % 5.1 % 3.7 % Small commercial and industrial (4.2) % (7.0) % (5.1) % Large commercial and industrial (7.9) % (9.3) % (7.3) % 1) This period most closely approximates the duration of the economic impact on our sales demand as a result of the COVID-19 pandemic.

Overview and Summary of Signi_4

Overview and Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020USD ($)generating_stationMW	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2020USD ($)generating_stationMW	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 511,659	$ 507,839	$ 518,761	$ 551,786	$ 551,327	$ 577,153	$ 511,659	$ 551,786	$ 546,476	$ 573,266
Accumulated Other Comprehensive Income (Loss), Net of Tax	(53,694)						(53,694)		(19,750)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	3,707			(12,534)			(36,632)	(29,722)
Inventories	36,154						36,154		26,907
Cash and cash equivalents	$ 38,815						$ 38,815		48,152
Number of customers	510,000						510,000
Number of generating stations | generating_station	4						4
Restricted Cash and Cash Equivalents	$ 20,513						$ 20,513		400
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	59,328			48,813			59,328	48,813	48,552	$ 33,599
Regulatory assets, current	59,498						59,498		56,662
Inventory, Net	95,652						95,652		83,569
Other Comprehensive Income (Loss), Net of Tax	5,051	(2,682)	$ (36,313)	(12,534)	(11,649)	$ (5,539)	(33,944)	(29,722)
Accounts Receivable, Allowance for Credit Loss, Current	3,520						3,520		921
Accounts Receivable, Credit Loss Expense (Reversal)							4,365
Accounts Receivable, Allowance for Credit Loss, Writeoff							(5,124)
Accounts Receivable, Allowance for Credit Loss, Recovery							3,358
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(53,694)						(53,694)		$ (19,750)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax							(36,632)
Income Tax Expense (Benefit)	10,981			13,088			25,918	28,252
Income Tax Expense (Benefit)	$ 10,981			13,088			25,918	28,252
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent							$ 2,688
Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
Electric generation capability for winter, megawatts | MW	3,705						3,705
Electric generation capability for summer, megawatts | MW	3,560						3,560
Aes U.S. Investments [Member]
Debt Instrument [Line Items]
Ownership percentage by parent (percent)	82.35%						82.35%
CDPQ [Member]
Debt Instrument [Line Items]
Ownership percentage by parent (percent)	17.65%						17.65%
Ownership interest in parent company (percent)	15.00%						15.00%
AES U.S. Holdings, LLC [Member]
Debt Instrument [Line Items]
Ownership interest in parent company (percent)	85.00%						85.00%
Harding Street [Member]
Debt Instrument [Line Items]
Amount of New Operation for Battery Storage Unit, megawatts | MW	20						20
Interest Rate Contract [Member]
Debt Instrument [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ 3,707			(12,534)			$ (36,632)	(29,722)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(53,694)	$ (58,745)		(29,722)	$ (17,188)		(53,694)	(29,722)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Debt Instrument [Line Items]
Interest and Debt Expense	1,807			0			3,614	0
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and Debt Expense	1,807			0			3,614	0
Income Tax Expense (Benefit)	(463)			0			(926)	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(1,344)			0			(2,688)	0
Income Tax Expense (Benefit)	(463)			0			(926)	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (1,344)			$ 0			$ (2,688)	$ 0

Overview and Summary Of Signi_5

Overview and Summary Of Significant Accounting Policies Schedule of cash, restricted cash and cash equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 38,815	$ 48,152
Restricted Cash and Cash Equivalents	20,513	400
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 59,328	$ 48,552	$ 48,813	$ 33,599

Overview and Summary Of Signi_6

Overview and Summary Of Significant Accounting Policies Schedule of Accounts and notes receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables from Customers	$ 97,018	$ 90,747
Unbilled Receivables, Current	54,829	65,822
Accounts Receivable, Related Parties	5,645	2,717
Other Receivables	4,588	2,725
Accounts Receivable, Allowance for Credit Loss	(3,520)	(921)
Accounts Receivable, after Allowance for Credit Loss, Current	$ 158,560	$ 161,090

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Jul. 24, 2019
Regulatory Matters [Line Items]
TDSIC Plan Improvement Costs			$ 1,200,000
Total current regulatory assets	$ 41,663	$ 37,398
Total long-term regulatory assets	341,066	355,614
Total current regulatory liabilities	46,871	52,654
Total long-term regulatory liabilities	836,976	$ 846,430
NOI Over Earnings	7,300
COVID-19 related uncollectible and incremental bad debt expense	$ 5,400

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	$ 3,089	$ 2,879
Asset retirement obligations	199,130	204,219
Unamortized deferred financing costs	25,100	20,700
Unamortized debt discount	6,700	6,500
Financial Transmission Rights Fair Value Disclosure	1,132	864
Assets, Fair Value Disclosure	4,221	3,743
Derivative Liability		26,560
Financial and Nonfinancial Liabilities, Fair Value Disclosure	75,824	26,560
Money Market Funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	20	25
Mutual Fund [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Fair Value, Inputs, Level 3 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0	0
Financial Transmission Rights Fair Value Disclosure	1,132	864
Assets, Fair Value Disclosure	1,132	864
Derivative Liability		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 [Member] | Mutual Fund [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Financial Transmission Rights Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	3,069	2,854
Derivative Liability		26,560
Financial and Nonfinancial Liabilities, Fair Value Disclosure	75,824	26,560
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Mutual Fund [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Fair Value, Inputs, Level 1 [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	20	25
Financial Transmission Rights Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	20	25
Derivative Liability		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	20	25
Fair Value, Inputs, Level 1 [Member] | Mutual Fund [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

Fair Value SUmmary of fair valu

Fair Value SUmmary of fair value Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	$ 3,089	$ 2,879
Financial Transmission Rights Fair Value Disclosure	1,132	864
Assets, Fair Value Disclosure	4,221	3,743
Interest Rate Cash Flow Hedge Liability at Fair Value	75,824	26,600
Derivative Liability		26,560
Financial and Nonfinancial Liabilities, Fair Value Disclosure	75,824	26,560
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	20	25
Financial Transmission Rights Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	20	25
Interest Rate Cash Flow Hedge Liability at Fair Value	0
Derivative Liability		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Financial Transmission Rights Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	3,069	2,854
Interest Rate Cash Flow Hedge Liability at Fair Value	75,824
Derivative Liability		26,560
Financial and Nonfinancial Liabilities, Fair Value Disclosure	75,824	26,560
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	0	0
Financial Transmission Rights Fair Value Disclosure	1,132	864
Assets, Fair Value Disclosure	1,132	864
Interest Rate Cash Flow Hedge Liability at Fair Value	0
Derivative Liability		0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	20	25
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	20	25
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	0	0
Mutual Fund [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	0	0
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	3,069	2,854
Mutual Fund [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	$ 0	$ 0

Fair Value (Schedule Of Face An

Fair Value (Schedule Of Face And Fair Value Of Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 6,700	$ 6,500
Face Value	2,733,800	2,678,800
Fair Value	3,327,023	3,031,140
Fixed Rate [Member]
Debt Instrument [Line Items]
Face Value	2,593,800	2,523,800
Fair Value	3,187,023	2,876,140
Variable Rate [Member]
Debt Instrument [Line Items]
Face Value	140,000	155,000
Fair Value	$ 140,000	$ 155,000

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Details) MWh in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020USD ($)MWh	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2020USD ($)MWh	Sep. 30, 2019USD ($)	Apr. 08, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 511,659,000	$ 507,839,000	$ 518,761,000	$ 551,786,000	$ 551,327,000	$ 577,153,000	$ 511,659,000	$ 551,786,000		$ 546,476,000	$ 573,266,000
Number of Interest Rate Swaps	3						3
Other Comprehensive Income (Loss), Net of Tax	$ 5,051,000	(2,682,000)	$ (36,313,000)	(12,534,000)	(11,649,000)	$ (5,539,000)	$ (33,944,000)	(29,722,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ 3,707,000			(12,534,000)			$ (36,632,000)	(29,722,000)
FTR [Member] | Not Designated as Hedging Instrument [Member]
Purchase of Units Derivative Instruments Financial Transmission Rights | MWh	5,135						5,135
Sale of Units Derivative Instruments Financial Transmission Rights | MWh	0						0
Derivative, Nonmonetary Notional Amount, Purchase (Sales), Net | MWh	5,135						5,135
Interest Rate Swap [Member]
Accumulated Other Income (Loss)									$ 72,300,000
Accumulated Other Income (Loss)									$ 72,300,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Purchase of Derivative Instruments Interest Rate Swap	$ 400,000,000						$ 400,000,000
Sale of Derivative Instruments Interest Rate Swap	0						0
Derivative, Notional Amount, Purchase (Sales), Net	400,000,000						400,000,000
Interest Rate Contract [Member]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(53,694,000)	$ (58,745,000)		(29,722,000)	$ (17,188,000)		(53,694,000)	(29,722,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	3,707,000			$ (12,534,000)			(36,632,000)	$ (29,722,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	(5,375,000)						$ (5,375,000)
Maximum Length of Time Hedged in Cash Flow Hedge							48 months
Interest Rate Contract [Member] | Interest Expense
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,344,000						$ 2,688,000
Other Current Assets [Member] | FTR [Member] | Not Designated as Hedging Instrument [Member]
Derivative Asset, Fair Value, Gross Asset	1,132,000,000						1,132,000,000			864,000,000
Derivative Liability, Current | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative Liability, Fair Value, Gross Liability	0						0			26,560,000,000
Derivative Liability, Noncurrent | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative Liability, Fair Value, Gross Liability	75,824,000,000						75,824,000,000			$ 0
Parent Company [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative, Notional Amount, Purchase (Sales), Net	$ 400,000,000						$ 400,000,000

Debt (Schedule Long-Term Indebt

Debt (Schedule Long-Term Indebtedness) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Apr. 14, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Unamortized discount - net	$ (6,700)		$ (6,500)
Deferred financing costs	(25,100)		(20,700)
Long-term debt	2,651,992		2,651,629
Less: Current Portion of Long-term Debt	184,853		559,199
Net Consolidated IPALCO Long-term Debt	2,467,139		2,092,430
Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
First mortgage bonds	1,691,572		1,691,015
Unamortized discount - net	(6,042)		(6,156)
Long-term debt	1,781,544		1,780,901
Unsecured Debt	$ 89,972		89,886
Indianapolis Power And Light Company [Member] | First Mortgage Bond 3.875% Due August 2021 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	3.875%
First mortgage bonds	$ 55,000		55,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 3.875% Due August 2021 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	3.875%
First mortgage bonds	$ 40,000		40,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.55% Due December 2024 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	3.125%
First mortgage bonds	$ 40,000		40,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 6.60% Due January 2034 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	6.60%
First mortgage bonds	$ 100,000		100,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 6.05% Due October 2036 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	6.05%
First mortgage bonds	$ 158,800		158,800
Indianapolis Power And Light Company [Member] | First Mortgage Bond 6.60% Due June 2037 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	6.60%
First mortgage bonds	$ 165,000		165,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.875% Due November 2041 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.875%
First mortgage bonds	$ 140,000		140,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.65% Due June 2043 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.65%
First mortgage bonds	$ 170,000		170,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.50% Due June 2044[Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.50%
First mortgage bonds	$ 130,000		130,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.70%, Due September 2045 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.70%
First mortgage bonds	$ 260,000		260,000
Indianapolis Power And Light Company [Member] | FMB Twenty [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.05%
First mortgage bonds	$ 350,000		350,000
Indianapolis Power And Light Company [Member] | FMB Twenty - one [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	4.875%
First mortgage bonds	$ 105,000		105,000
Indianapolis Power And Light Company [Member] | Environmental Facilities Refunding Revenue Notes, Series 2015A [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	1.047%
Unsecured Debt	$ 30,000		30,000
Indianapolis Power And Light Company [Member] | Environmental Facilities Refunding Revenue Notes, Series 2015B [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	1.047%
Unsecured Debt	$ 60,000		60,000
Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Unamortized discount - net	(649)		(313)
Deferred financing costs	(8,903)		(3,959)
Net Consolidated IPALCO Long-term Debt	870,448		870,728
Ipalco Enterprises, Inc. [Member] | Bank Term Loan Maturing July 2020 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 65,000	65,000
Ipalco Enterprises, Inc. [Member] | 3.45% Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	3.45%
Long-term debt	$ 0		405,000
Ipalco Enterprises, Inc. [Member] | Three Point Seven Zero Percent Senior Secured Notes [Domain]
Debt Instrument [Line Items]
Debt, stated interest rate	3.70%
Long-term debt	$ 405,000		405,000
Ipalco Enterprises, Inc. [Member] | Four Point Two Five Percent Senior Secured Notes
Debt Instrument [Line Items]
Debt, stated interest rate	4.25%
Long-term debt	$ 475,000		0
First Mortgage Bonds [Member] | Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
Deferred financing costs	(16,186)		(16,629)
Unsecured Debt [Member] | Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
Deferred financing costs	$ (28)		$ (114)

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Apr. 14, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 300	$ 1,000
Long-term Debt	2,651,992	2,651,992		$ 2,651,629
Subsidiaries [Member]
Debt Instrument [Line Items]
Unsecured Debt	89,972	89,972		89,886
Long-term Debt	1,781,544	1,781,544		1,780,901
Secured Debt	$ 1,691,572	$ 1,691,572		1,691,015
Unsecured Debt, Current				90,000
Subsidiaries [Member] | Three Point Eight Seven Five Percent First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.875%	3.875%
Subsidiaries [Member] | Environmental Facilities Refunding Revenue Notes [Member]
Debt Instrument [Line Items]
Unsecured Debt				90,000
Subsidiaries [Member] | Environmental Facilities Refunding Revenue Notes, Series 2015A [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 30,000	$ 30,000		30,000
Debt Instrument, Interest Rate, Stated Percentage	1.047%	1.047%
Subsidiaries [Member] | Environmental Facilities Refunding Revenue Notes, Series 2015B [Member]
Debt Instrument [Line Items]
Unsecured Debt	$ 60,000	$ 60,000		60,000
Debt Instrument, Interest Rate, Stated Percentage	1.047%	1.047%
Subsidiaries [Member] | Three Point Eight Seven Five Percent First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Secured Debt	$ 95,000	$ 95,000
Parent Company [Member] | Three Point Four Five Percent Senior Secured Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 475,000	$ 475,000		0
Debt Instrument, Interest Rate, Stated Percentage	4.25%	4.25%
Notes Price to Public of Principal Amount (Percentage)	99.909%	99.909%
Long-term debt, net proceeds	$ 468,600	$ 468,600
Parent Company [Member] | Bank Term Loan Maturing July 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt	0	0	$ 65,000	65,000
Parent Company [Member] | Three Point Seven Zero Percent Senior Secured Notes [Domain]
Debt Instrument [Line Items]
Long-term Debt	$ 405,000	$ 405,000		405,000
Debt Instrument, Interest Rate, Stated Percentage	3.70%	3.70%
Line of Credit [Member] | Committed Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit, outstanding borrowings	$ 50,000	$ 50,000		$ 0

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
State and federal income tax rate	21.40%	21.20%	21.40%	21.20%
Effective Income Tax Rate Reconciliation, at Combined Federal and State Statutory Income Tax Rate, Percent			25.30%

Benefit Plans (Narrative) (Deta

Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Postretirement Health Care Benefits [Member] | Subsidiaries [Member]
Defined Benefit Plan Disclosure [Line Items]
Unfunded obligation	$ 6.7	$ 6.4

Benefit Plans (Schedule Of Defi

Benefit Plans (Schedule Of Defined Benefit Plans Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Unfunded Status of Plans [Roll Forward]
Service cost	$ (2,068)	$ (1,853)	$ (6,204)	$ (5,558)
Interest cost	(5,538)	(6,836)	(16,614)	(20,508)
Expected return on assets	9,445	7,477	28,335	22,431
Regulatory Assets Related to Pensions [Roll Forward]
Amortization of prior service cost	(920)	(956)	(2,758)	(2,869)
Defined Benefit Plan, Amortization of Gain (Loss)	$ (2,029)	$ (2,770)	$ (6,086)	$ (8,311)

Benefit Plans (Schedule Of Net

Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Retirement Benefits [Abstract]
Service cost	$ 2,068	$ 1,853	$ 6,204	$ 5,558
Interest cost	5,538	6,836	16,614	20,508
Expected return on assets	(9,445)	(7,477)	(28,335)	(22,431)
Amortization of prior service cost	920	956	2,758	2,869
Amortization of actuarial loss	2,029	2,770	6,086	8,311
Net periodic benefit cost	$ 1,110	$ 4,938	$ 3,327	$ 14,815

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	1 Months Ended
	Oct. 31, 2009coal_fired_electric_generating_facility	Sep. 30, 2020USD ($)
Entity Information [Line Items]
Payment of Civil Penalties		$ 1,525
Environmental Mitigation Project Costs		5,000
Environmentally Beneficial Project Expenditure		$ 325
Indianapolis Power And Light Company [Member]
Entity Information [Line Items]
Number of facilities with violations of Federal Clean Air Act | coal_fired_electric_generating_facility	3

Business Segment Information (D

Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Financed Capital Expenditures			$ 100	$ 5,600
Income Tax Expense (Benefit)	$ 10,981	$ 13,088	25,918	28,252
Net Income (Loss) Attributable to Parent	40,299	48,506	95,405	105,204
UTILITY OPERATING REVENUES	356,088	398,456	1,024,973	1,121,634
Depreciation and amortization	62,359	60,373	184,166	179,939
Interest Expense	32,741	30,620	96,757	91,393
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	51,280	61,594	121,323	133,456
Property, Plant and Equipment, Additions			149,420	131,682
Assets	4,958,300	4,928,669	4,958,300	4,928,669	$ 4,928,669
Cash	2,800		2,800		6,000
Other Long-term Investments	3,100		3,100
Interest Rate Cash Flow Hedge Liability at Fair Value	75,824		$ 75,824		26,600
Nonutility assets representation rate, percentage			1.00%
Restricted Cash	20,100		$ 20,100		$ 0
Electric [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	62,359	60,373	184,166	179,939
Interest Expense	21,725	22,244	65,527	66,757
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	62,098	69,881	155,835	158,153
Property, Plant and Equipment, Additions			149,420	131,682
Assets	4,942,923	4,918,408	4,942,923	4,918,408
Other Segments [Member]
Segment Reporting Information [Line Items]
UTILITY OPERATING REVENUES	0	0	0	0
Depreciation and amortization	0	0	0	0
Interest Expense	11,016	8,376	31,230	24,636
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(10,818)	(8,287)	(34,512)	(24,697)
Property, Plant and Equipment, Additions			0	0
Assets	15,377	10,261	15,377	10,261
Electricity [Member]
Segment Reporting Information [Line Items]
UTILITY OPERATING REVENUES	$ 356,088	$ 398,456	$ 1,024,973	$ 1,121,634

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Contract with Customer, Asset, before Allowance for Credit Loss	$ 151,700		$ 151,700		$ 155,000
Revenue from Contract with Customer, Excluding Assessed Tax	350,500	$ 391,500	1,004,800	$ 1,100,400
REVENUES	356,088	398,456	1,024,973	1,121,634
Contract with Customer, Liability	800		800
Contract with Customer, Liability, Revenue Recognized	300		1,000
Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	329,457	369,945	962,919	1,056,438
Other non-606 revenue	5,225	6,478	18,910	19,069
Wholesale Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	17,667	18,426	33,476	35,533
Miscellaneous revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,331	3,091	8,392	8,474
Other non-606 revenue	408	516	1,276	2,120
Electricity [Member]
Disaggregation of Revenue [Line Items]
REVENUES	356,088	398,456	1,024,973	1,121,634
Utility | Retail Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,875	3,864	10,568	10,372
Utility | Retail Revenue [Member] | Residential Revenue
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	145,407	155,670	428,568	450,864
Utility | Retail Revenue [Member] | Small Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	50,023	56,192	147,678	165,961
Utility | Retail Revenue [Member] | Large Commercial and Industrial
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	127,884	151,816	369,224	424,348
Utility | Retail Revenue [Member] | Public Lighting
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,268	$ 2,403	$ 6,881	$ 4,893

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Lease Income	$ 200	$ 200	$ 700	$ 700
Lessor, Operating Lease, Payment to be Received, Year One	222		222
Lessor, Operating Lease, Payment to be Received, Year Two	886		886
Lessor, Operating Lease, Payment to be Received, Year Three	906		906
Lessor, Operating Lease, Payment to be Received, Year Four	906		906
Lessor, Operating Lease, Payment to be Received, Year Five	786		786
Lessor, Operating Lease, Payment to be Received, after Year Five	2,628		2,628
Lessor, Operating Lease, Payments to be Received	6,334		6,334
Lessor, Operating Lease, Assumptions and Judgments, Value of Underlying Asset, Amount	4,400		4,400		$ 4,300
Property Subject to or Available for Operating Lease, Accumulated Depreciation	$ 800		$ 800		$ 700

Risks and Uncertainties (Detail

Risks and Uncertainties (Details)	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020
Residential [Member]
Unusual Risk or Uncertainty [Line Items]
Percentage Increase / Decrease in weather-normalized volumes of kWh sold	3.90%	5.10%	3.70%
Small Commercial and Industrial
Unusual Risk or Uncertainty [Line Items]
Percentage Increase / Decrease in weather-normalized volumes of kWh sold	(4.20%)	(7.00%)	(5.10%)
Large Commercial and Industrial
Unusual Risk or Uncertainty [Line Items]
Percentage Increase / Decrease in weather-normalized volumes of kWh sold	(7.90%)	(9.30%)	(7.30%)