Ipalco Enterprises 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 03, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2,016
Entity Registrant Name	IPALCO ENTERPRISES, INC.
Entity Central Index Key	728,391
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		108,907,318

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
UTILITY OPERATING REVENUES	$ 361,339	$ 326,562	$ 1,012,373	$ 951,240
Operation:
Fuel	80,451	85,631	200,115	248,147
Other operating expenses	59,548	58,770	178,991	168,578
Power purchased	39,464	32,606	132,333	106,591
Maintenance	25,918	25,973	92,919	98,010
Depreciation and amortization	54,876	46,662	166,027	136,038
Taxes other than income taxes	11,779	10,061	34,317	33,553
Income taxes - net	29,457	21,404	63,290	48,386
Total utility operating expenses	301,493	281,107	867,992	839,303
UTILITY OPERATING INCOME	59,846	45,455	144,381	111,937
OTHER INCOME AND (DEDUCTIONS):
Allowance for equity funds used during construction	7,077	3,888	20,454	10,185
Gains (Losses) on Extinguishment of Debt	0	(2,728)	0	(22,051)
Miscellaneous income and (deductions) - net	(299)	(556)	(1,433)	(1,924)
Income tax benefit applicable to nonoperating income	4,485	5,521	10,748	24,102
Total other income and (deductions) - net	11,263	6,125	29,769	10,312
INTEREST AND OTHER CHARGES:
Interest on long-term debt	29,018	24,720	82,571	80,061
Other interest	367	539	1,730	1,487
Allowance for borrowed funds used during construction	(6,549)	(3,411)	(18,007)	(8,644)
Amortization of redemption premiums and expense on debt	1,017	1,086	3,123	3,755
Total interest and other charges - net	23,853	22,934	69,417	76,659
NET INCOME (LOSS)	47,256	28,646	104,733	45,590
LESS: PREFERRED DIVIDENDS OF SUBSIDIARY	803	803	2,410	2,410
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK	$ 46,453	$ 27,843	$ 102,323	$ 43,180

Unaudited Condensed Consolidat3

Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
UTILITY PLANT:
Utility plant in service	$ 5,013,898	$ 4,992,594
Less accumulated depreciation	2,089,517	2,320,955
Utility plant in service - net	2,924,381	2,671,639
Construction work in progress	881,284	766,406
Spare parts inventory	15,357	12,336
Property held for future use	1,002	1,002
Utility plant - net	3,822,024	3,451,383
OTHER ASSETS:
Nonutility property - at cost, less accumulated depreciation	513	517
Other long-term assets	5,781	5,664
Other assets - net	6,294	6,181
CURRENT ASSETS:
Cash and cash equivalents	51,303	21,521
Accounts receivable and unbilled revenue (less allowance for doubtful accounts of $3,262 and $2,498, respectively)	154,031	124,167
Fuel inventories - at average cost	32,015	66,834
Materials and supplies - at average cost	61,111	57,997
Regulatory assets	28,054	8,002
Prepayments and other current assets	36,929	26,063
Total current assets	363,443	304,584
DEFERRED DEBITS:
Regulatory assets	444,499	448,200
Miscellaneous	5,362	6,821
Total deferred debits	449,861	455,021
TOTAL	4,641,622	4,217,169
Common shareholders’ equity:
Paid in capital	596,849	383,448
Accumulated deficit	(14,635)	(30,515)
Total common shareholders’ equity	582,214	352,933
Cumulative preferred stock of subsidiary	59,784	59,784
Long-term debt (Note 5)	2,473,463	2,153,276
Total capitalization	3,115,461	2,565,993
CURRENT LIABILITIES:
Short-term debt (Note 5)	49,650	166,655
Accounts payable	101,194	155,428
Accrued expenses	21,022	19,482
Accrued real estate and personal property taxes	22,168	17,712
Regulatory liabilities	15,309	28,169
Accrued interest	11,492	0
Customer deposits	33,882	30,719
Other current liabilities	18,397	12,623
Total current liabilities	316,158	462,478
DEFERRED CREDITS AND OTHER LONG-TERM LIABILITIES:
Regulatory liabilities	658,583	639,516
Deferred income taxes - net	423,523	397,394
Non-current income tax liability	7,340	7,147
Unamortized investment tax credit	2,987	3,910
Accrued pension and other postretirement benefits	57,161	80,734
Asset retirement obligations	58,581	58,986
Miscellaneous	1,828	1,011
Total deferred credits and other long-term liabilities	1,210,003	1,188,698
COMMITMENTS AND CONTINGENCIES
TOTAL	$ 4,641,622	$ 4,217,169

Unaudited Condensed Consolidat4

Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable and unbilled revenue, allowance for doubtful accounts	$ 3,262	$ 2,498

Unaudited Condensed Consolidat5

Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATIONS:
Net income	$ 104,733	$ 45,590
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	162,467	149,862
Amortization (deferral) of regulatory assets	6,554	(10,639)
Amortization of debt premium	132	574
Deferred income taxes and investment tax credit adjustments - net	15,680	24,284
Gain (Loss) on Early Extinguishment of Debt	0	22,051
Allowance for equity funds used during construction	(20,125)	(9,969)
Change in certain assets and liabilities:
Accounts receivable	(29,864)	4,267
Fuel, materials and supplies	31,705	(20,751)
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	12,163	0
Income taxes receivable	(3,279)	(359)
Accounts payable and accrued expenses	(1,306)	191
Accrued real estate and personal property taxes	4,456	3,257
Accrued interest	11,354	8,743
Pension and other postretirement benefit expenses	(23,573)	(29,986)
Short-term and long-term regulatory assets and liabilities	(26,623)	3,777
Prepaids and other current assets	(2,802)	(5,113)
Other - net	7,396	2,458
Net cash provided by operating activities	249,068	188,237
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures - utility	(516,895)	(458,180)
Project development costs	(852)	(8,146)
Cost of removal, net of salvage	(10,881)	(7,997)
Other	(1,525)	58
Net cash used in investing activities	(530,153)	(474,265)
CASH FLOWS FROM FINANCING ACTIVITIES:
Short-term debt borrowings	248,000	222,000
Short-term debt repayments	(389,850)	(222,000)
Proceeds from Debt, Net of Issuance Costs	347,662	663,350
Repayments of Long-term Debt	0	420,242
Retirement of long-term debt, including make-whole provision	(86,443)	(61,170)
Issuance of common stock	134,276	214,366
Proceeds from Contributed Capital	78,738
Proceeds from Contributions from Parent		0
Preferred dividends of subsidiary	(2,410)	(2,410)
Deferred financing costs paid	(3,964)	(7,363)
Retention payments on capital expenditures	(14,990)	(1,829)
Other	(152)	(369)
Net cash provided by financing activities	310,867	384,333
Net change in cash and cash equivalents	29,782	98,305
Cash and cash equivalents at beginning of period	21,521	26,933
Cash and cash equivalents at end of period	51,303
Cash paid during the period for:
Interest (net of amount capitalized)	54,911	64,133
Income taxes	24,700
Non-cash investing activities:
Accruals for capital expenditures	$ 37,357	$ 61,188

Overview and Summary Of Signifi

Overview and Summary Of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Overview and Summary Of Significant Accounting Policies	OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES IPALCO is a holding company incorporated under the laws of the state of Indiana. IPALCO, acquired by AES in March 2001, 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 more than 480,000 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. Our largest generating station, Petersburg, is coal-fired. The second largest station, Harding Street, has converted its coal-fired units to natural gas and uses natural gas and fuel oil to power combustion turbines. The third station, Eagle Valley, retired its coal-fired units in April 2016 and the CCGT at Eagle Valley is expected to be placed into service in the first half of 2017. The fourth station, Georgetown, is a small peaking station that uses natural gas to power combustion turbines. As of September 30, 2016, IPL’s net electric generation capacity for winter is 2,993 MW and net summer capacity is 2,878 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 the audited financial statements filed as Exhibit 99.1 to IPALCO’s current report on Form 8-K filed with the SEC on May 12, 2016, 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. New Accounting Pronouncements The following table provides a brief description of recent accounting pronouncements that had and/or could have a material impact on the Company’s consolidated financial statements. 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 consolidated financial statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2015-03, 2015-15, Interest - Imputation of Interest (Subtopic 835-30) These standards simplify the presentation of debt issuance costs by requiring that debt issuance costs related to a tranche of debt be presented on the balance sheet as a direct deduction from the carrying amount of that debt, consistent with debt discounts. Debt issuance costs related to a line-of-credit can still be presented as an asset and subsequently amortized over the term of the line-of-credit, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The recognition and measurement guidance for debt issuance costs are not affected by the standard. Transition method: retrospective. January 1, 2016 Deferred financing costs of approximately $20.8 million previously classified within Deferred Debits were reclassified to reduce the related debt liabilities as of December 31, 2015. 2015-02, Consolidation - Amendments to the Consolidation Analysis (Topic 810) The standard makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the VIE guidance. The standard amends the evaluation of whether (1) fees paid to a decision-maker or service providers represent a variable interest, (2) a limited partnership or similar entity has the characteristics of a VIE and (3) a reporting entity is the primary beneficiary of a VIE. Transition method: retrospective. January 1, 2016 There were no changes to the consolidation conclusions. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2016-17, Consolidation (Topic 810): Interest Held Through Related Parties that are Under Common Control This standard amends the evaluation of whether a reporting entity is the primary beneficiary of a VIE by amending how a reporting entity, that is a single decision maker of a VIE, treats indirect interests in that entity held through related parties that are under common control. Transition method: retrospectively. January 1, 2017 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory This standard requires that an entity recognizes the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Transition method: modified retrospective method. January 1, 2018 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) This standard provides specific guidance on how certain cash transactions are presented and classified in the statement of cash flows. Transition method: various. January 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard, but does not anticipate a material impact on its consolidated financial statements. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This standard updates the impairment model for financial assets measured at amortized cost to an expected loss model rather than an incurred loss model. It also allows for the presentation of credit losses on available-for-sale debt securities as an allowance rather than a write down. Transition method: various. January 1, 2020 Early adoption is permitted only as of January 1, 2019. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting The standard simplifies the following aspects of accounting for share-based payment awards: accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities and classification of employee taxes paid on statement of cash flows when an employer withholds shares for tax-withholding purposes. Transition method: Various. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-02, Leases (Topic 842) The standard creates Topic 842, Leases, which supersedes Topic 840, Leases. It introduces a lessee model that brings substantially all leases onto the balance sheet while retaining most of the principles of the existing lessor model in U.S. GAAP and aligning many of those principles with ASC 606, Revenue from Contracts with Customers. Transition method: modified retrospective approach with certain practical expedients. January 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory The standard replaces the current lower of cost or market test with a lower of cost or net realizable value test. Transition method: prospectively. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2014-09, 2015-14, 2016-08, 2016-10, 2016-12 Revenue from Contracts with Customers (Topic 606) The Revenue from Contracts with Customers standard provides a single and comprehensive revenue recognition model for all contracts with customers to improve comparability. The standard contains principles to determine the measurement and timing of revenue recognition. The standard requires an entity to recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The amendments to the standard provide further clarification on contract revenue recognition specifically related to the implementation of the principal versus agent evaluation, the identification of performance obligations, clarification on accounting for licenses of intellectual property, and allows for the election to account for shipping and handling activities performed after control of a good has been transferred to the customer as a fulfillment cost. Transition method: a full retrospective or modified retrospective approach. January 1, 2018. Early application is permitted only as of January 1, 2017. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2016
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY MATTERS In March 2016, the IURC issued an order authorizing IPL to increase its basic rates and charges by $30.8 million annually. The order also authorized IPL to collect, over a ten year period, $117.7 million of previously deferred regulatory assets related to IPL’s participation in the regional transmission organization known as MISO. Such deferred costs will be amortized to expense over ten years. Accordingly, $11.8 million of IPL’s long-term MISO regulatory asset as of December 31, 2015 has been reclassified to current regulatory assets on the accompanying Unaudited Condensed Consolidated Balance Sheets. The rate order also authorized an increase in IPL’s depreciation rates of $24.3 million annually compared to the twelve months ended June 30, 2014, which is the period upon which the rate increase was calculated. IPL also received approval to implement three new rate riders for current recovery from customers of ongoing MISO costs, capacity costs and sharing at 50% of wholesale sales margins with customers. The order approved recovery of IPL’s pension expenses and a return on IPL’s discretionary pension fundings. While the IURC noted in the order that they found IPL’s Service Company cost allocations to be reasonable, IPL was directed to request the FERC to review its Service Company allocations. Such review is currently underway. The IURC also closed their investigation into IPL’s underground network. Some of the intervening parties in the IURC rate case filed petitions for reconsideration of the IURC’s March 2016 order with respect to certain issues. These petitions were subsequently denied by the IURC. In addition, certain intervening parties have filed notices of appeal of the order. As described in IPALCO’s 2015 Form 10-K, in May 2014, IPL received an order from the IURC granting approval to build a 644 to 685 MW CCGT at Eagle Valley. The costs to build and operate the CCGT, other than fuel costs, will not be recoverable by IPL through rates until the conclusion of a base rate case proceeding with the IURC after the assets have been placed in service. The CCGT is expected to be placed into service in the first half of 2017. IPL intends to file its next base rate case proceeding in the near future. The amounts of regulatory assets and regulatory liabilities are as follows: September 30, 2016 December 31, 2015 Recovery Period (In Thousands) Regulatory Assets Current: Undercollections of rate riders $ 14,101 $ 8,002 Approximately 1 year (1) Costs being recovered through base rates 13,953 — Approximately 1 year (1) Total current regulatory assets $ 28,054 $ 8,002 Long-term: Unrecognized pension and other postretirement benefit plan costs $ 213,102 $ 226,889 Various (2) Income taxes recoverable through rates 44,906 35,765 Various Deferred MISO costs 117,301 128,610 Through 2026 (3) Unamortized Petersburg Unit 4 carrying charges and certain other costs 10,457 11,248 Through 2026 (1) (4) Unamortized reacquisition premium on debt 22,290 23,268 Over remaining life of debt Environmental projects 32,522 16,876 Through 2050 (1)(4) Other miscellaneous 3,921 5,544 To be determined (1)(5) Total long-term regulatory assets $ 444,499 $ 448,200 Total regulatory assets $ 472,553 $ 456,202 Regulatory Liabilities Current: Overcollections of rate riders $ 7,881 $ 24,019 Approximately 1 year (1) FTRs 7,428 4,150 Approximately 1 year (1) Total current regulatory liabilities $ 15,309 $ 28,169 Long-term: ARO and accrued asset removal costs $ 656,711 $ 637,065 Not Applicable Unamortized investment tax credit 1,872 2,451 Through 2021 Total long-term regulatory liabilities $ 658,583 $ 639,516 Total regulatory liabilities $ 673,892 $ 667,685 (1) Recovered (credited) per specific rate orders (2) IPL receives a return on its discretionary funding (3) The majority of these costs are being recovered per specific rate order; for the remaining costs recovery is probable but timing not yet determined (4) Recovered with a current return (5) A portion of this amount will be recovered over the next two years

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE Fair Value Hierarchy ASC 820 defined and established a framework for measuring fair value and expands disclosures about fair value measurements for financial assets and liabilities that are adjusted to fair value on a recurring basis and/or financial assets and liabilities that are measured at fair value on a nonrecurring basis, which have been adjusted to fair value during the period. In accordance with ASC 820, we have categorized our financial assets and liabilities that are adjusted to fair value, based on the priority of the inputs to the valuation technique, following the three-level fair value hierarchy prescribed by ASC 820 as follows: Level 1 - unadjusted quoted prices for identical assets or liabilities in an active market; Level 2 - inputs from quoted prices in markets where trading occurs infrequently or quoted prices of instruments with similar attributes in active markets; and Level 3 - unobservable inputs reflecting management’s own assumptions about the inputs used in pricing the asset or liability. As of September 30, 2016 and December 31, 2015 , all of IPALCO’s financial assets or liabilities adjusted to fair value on a recurring basis (excluding pension assets – see Note 7, “ Benefit Plans ”) were considered Level 3, based on the above fair value hierarchy. These primarily consisted of FTRs, which are used to offset MISO congestion charges. Because the benefit associated with FTRs is a flow-through to IPL’s jurisdictional customers, IPL records a regulatory liability matching the value of the FTRs. In addition, IPALCO had one financial asset, a nonutility investment accounted for using the cost method of accounting, which is measured at fair value on a nonrecurring basis, again using Level 3 measurements. No adjustments were made to this asset during the periods covered by this report. All of these financial assets and liabilities were not material to the Financial Statements in the periods covered by this report, individually or in the aggregate. Whenever possible, quoted prices in active markets are used to determine the fair value of our financial instruments. Our financial instruments are not held for trading or other speculative purposes. The estimated fair value of financial instruments has been determined by using available market information and appropriate valuation methodologies. However, considerable judgment is required in interpreting market data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts that we could realize in a current market exchange. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. Non-Recurring Fair Value Measurements ASC 410 “Asset Retirement and Environmental Obligations” addresses financial accounting and reporting for legal obligations associated with the retirement of long-lived assets that result from the acquisition, construction, development and/or normal operation. A legal obligation for purposes of ASC 410 is an obligation that a party is required to settle as a result of an existing law, statute, ordinance, written or oral contract or the doctrine of promissory estoppel. IPL’s ARO liabilities relate primarily to environmental issues involving asbestos-containing materials, ash ponds, landfills and miscellaneous contaminants associated with its generating plants, transmission system and distribution system. We use the cost approach to determine the fair value of IPL’s ARO liabilities, which is estimated by discounting expected cash outflows to their present value at the initial recording of the liabilities. Cash outflows are based on the approximate future disposal costs as determined by market information, historical information or other management estimates. These inputs to the fair value of the ARO liabilities would be considered Level 3 inputs under the fair value hierarchy. As of September 30, 2016 and December 31, 2015 , ARO liabilities were $58.6 million and $59.0 million , respectively. 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, 2016 December 31, 2015 Face Value Fair Value Face Value Fair Value (In Millions) Fixed-rate $ 2,438.5 $ 2,710.8 $ 2,088.4 $ 2,225.3 Variable-rate 115.0 115.0 256.9 256.9 Total indebtedness $ 2,553.5 $ 2,825.8 $ 2,345.3 $ 2,482.2 The difference between the face value and the carrying value of this indebtedness represents the following: • unamortized deferred financing costs of $23.5 million and $20.8 million at September 30, 2016 and December 31, 2015, respectively; and • unamortized discounts of $6.8 million and $4.6 million at September 30, 2016 and December 31, 2015 , respectively.

Equity

Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Equity	EQUITY On February 11, 2015, IPALCO issued and sold 100 shares of IPALCO’s common stock to CDPQ under the Subscription Agreement. On April 1, 2015, IPALCO issued and sold 11,818,828 shares of IPALCO’s common stock to CDPQ for $214.4 million under the Subscription Agreement. On March 1, 2016, IPALCO issued and sold 7,403,213 shares of IPALCO’s common stock to CDPQ for $134.3 million under the Subscription Agreement. After completion of these transactions, CDPQ’s direct and indirect interest in IPALCO is 30% . On June 1, 2016, IPALCO received equity capital contributions of (i) $64.8 million from AES U.S. Investments and (ii) $13.9 million from CDPQ. IPALCO then made the same investments in IPL. The proceeds were primarily used for funding needs related to IPL’s environmental and replacement generation projects. The capital contributions on June 1, 2016 were made on a proportional share basis and, therefore, did not change CDPQ’s or AES’ ownership interests in IPALCO.

Debt

Debt	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Indebtedness	DEBT Long-Term Debt The following table presents our long-term debt: September 30, December 31, Series Due 2016 2015 (In Thousands) IPL first mortgage bonds: 5.40% (1) August 2017 $ 24,650 $ 24,650 3.875% (2) August 2021 55,000 55,000 3.875% (2) August 2021 40,000 40,000 4.55% (2) 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 — Unamortized discount – net (6,508 ) (4,242 ) Deferred financing costs (3) (18,043 ) (13,703 ) Total IPL first mortgage bonds 1,608,899 1,265,505 IPL unsecured debt: Variable (4) December 2020 30,000 30,000 Variable (4) December 2020 60,000 60,000 Total IPL unsecured debt 90,000 90,000 Total Long-term Debt – IPL 1,698,899 1,355,505 Long-term Debt – IPALCO: 5.00% Senior Secured Notes May 2018 400,000 400,000 3.45% Senior Secured Notes July 2020 405,000 405,000 Unamortized discount – net (311 ) (371 ) Deferred financing costs (3) (5,475 ) (6,858 ) Total Long-term Debt – IPALCO 799,214 797,771 Total Consolidated IPALCO Long-term Debt $ 2,498,113 $ 2,153,276 Less: Current Portion of Long-term Debt 24,650 — Net Consolidated IPALCO Long-term Debt $ 2,473,463 $ 2,153,276 (1) First mortgage bonds are issued to the city of Petersburg, Indiana, to secure the loan of proceeds from tax-exempt bonds issued by the city. (2) First mortgage bonds are issued to the Indiana Finance Authority, to secure the loan of proceeds from tax-exempt bonds issued by the Indiana Finance Authority. (3) The Company adopted ASU No. 2015-03 on January 1, 2016, which requires the use of the full retrospective approach with respect to the presentation of debt issuance costs, including deferred charges. (4) Unsecured notes are 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. Significant Transactions IPL First Mortgage Bonds In September 2015, IPL issued $260 million aggregate principal amount of first mortgage bonds, 4.70% Series, due September 2045, pursuant to Rule 144A and Regulation S under the Securities Act. Net proceeds from this offering were approximately $255.6 million , after deducting the initial purchasers’ discounts and fees and expenses for the offering. The net proceeds from the offering were used to finance a portion of IPL’s construction program and capital costs related to environmental and replacement generation projects and for other general corporate purposes. In May 2016, IPL issued $350 million aggregate principal amount of first mortgage bonds, 4.05% Series, due May 2046, pursuant to Rule 144A and Regulation S under the Securities Act. Net proceeds from this offering were approximately $343.6 million , after deducting the initial purchasers’ discounts and fees and expenses for the offering. The net proceeds from this offering were used to finance a portion of IPL’s construction program and capital costs related to environmental and replacement generation projects, to repay outstanding borrowings under IPL’s 364-day delayed-draw term loan and other short-term debt, and for other general corporate purposes. IPL Unsecured Notes In May 2016, IPL repaid $91.85 million in outstanding borrowings under its 364 -day delayed-draw term loan with a portion of the proceeds from its $350 million aggregate principal amount of first mortgage bonds as described above in “ – IPL First Mortgage Bonds . ” IPALCO ’ s Senior Secured Notes In June 2015, IPALCO completed the sale of the 2020 IPALCO Notes pursuant to Rule 144A and Regulation S under the Securities Act. The 2020 IPALCO Notes were issued pursuant to an Indenture dated June 25, 2015, by and between IPALCO and U.S. Bank, National Association, as trustee. The 2020 IPALCO Notes were priced to the public at 99.929% of the principal amount. Net proceeds to IPALCO were approximately $399.5 million after deducting underwriting costs and estimated offering expenses. These costs are being amortized to the maturity date using the effective interest method. We used the net proceeds from this offering to fund the purchase of the 2016 IPALCO Notes validly tendered and to pay for a related consent solicitation, to redeem any 2016 IPALCO Notes that remained outstanding after the completion of the tender, and to pay certain related fees, expenses and make-whole premiums. Of the 2016 IPALCO Notes outstanding, $366.5 million were tendered in June 2015. The remainder, $33.5 million , was redeemed in July 2015. An early tender premium was paid related to the tender offer and a redemption premium was paid related to the redemption of the 2016 IPALCO Notes. A loss on early extinguishment of debt of $22.1 million for the 2016 IPALCO Notes is included as a separate line item within “ Other Income and (Deductions) ” in the accompanying Unaudited Condensed Consolidated Statements of Operations. The 2020 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 entered into a Pledge Agreement Supplement with the Bank of New York Mellon Trust Company, N.A., as Collateral Agent, dated June 25, 2015, to the Pledge Agreement between IPALCO and The Bank of New York Mellon Trust Company, N.A., dated November 14, 2001, as supplemented by a Pledge Agreement Supplement dated April 15, 2008 and a Pledge Agreement Supplement dated May 18, 2011, each by IPALCO in favor of the Collateral Agent. IPALCO also agreed to register the 2020 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 that IPALCO entered into with J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC, as representatives of the initial purchasers of the 2020 IPALCO Notes. IPALCO filed its registration statement on Form S-4 with respect to the 2020 IPALCO Notes with the SEC on September 28, 2015, and this registration statement was declared effective on October 15, 2015. The exchange offer was completed on November 16, 2015. Line of Credit IPL entered into an amendment and restatement of its 5 -year $250 million revolving credit facility in May 2014, and a further amendment and extension of the credit facility on October 16, 2015 (the “Credit Agreement”) with a syndication of banks. This Credit Agreement is an unsecured committed line of credit to be used: (i) to finance capital expenditures; (ii) to refinance indebtedness under the existing credit agreement; (iii) to support working capital; and (iv) for general corporate purposes. This agreement matures on October 16, 2020 , and bears interest at variable rates as described in the Credit Agreement. It includes an uncommitted $150 million accordion feature to provide IPL with an option to request an increase in the size of the facility at any time prior to October 16, 2019, subject to approval by the lenders. Prior to execution, IPL and IPALCO had existing general banking relationships with the parties in this agreement. As of September 30, 2016 and December 31, 2015 , IPL had $25.0 million and $75.0 million in outstanding borrowings on the committed line of credit, respectively.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES IPALCO’s effective combined state and federal income tax rates were 35.0% and 33.9% for the three and nine months ended September 30, 2016, respectively, as compared to 36.3% and 36.0% for the three and nine months ended September 30, 2015, respectively. The decrease in the effective tax rates versus the comparable periods was primarily the result of an increase in the allowance for equity funds used during construction in 2016 and the manufacturer’s production deduction (Internal Revenue Code Section 199) that had been previously disallowed due to a Net Operating Loss carryover.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	BENEFIT PLANS The following table (in thousands) presents information for the nine months ended September 30, 2016 , relating to the Pension Plans: Net unfunded status of plans: Net unfunded status at December 31, 2015, before tax adjustments $ (76,314 ) Net benefit cost components reflected in net unfunded status during first quarter: Service cost (1,754 ) Interest cost (6,454 ) Expected return on assets 10,873 Employer contributions 15,900 Net unfunded status at March 31, 2016, before tax adjustments $ (57,749 ) Net benefit cost components reflected in net unfunded status during second quarter: Service cost $ (1,755 ) Interest cost (6,454 ) Expected return on assets 10,874 Net unfunded status at June 30, 2016, before tax adjustments $ (55,084 ) Net benefit cost components reflected in net unfunded status during third quarter: Service cost $ (1,754 ) Interest cost (6,454 ) Expected return on assets 10,873 Net unfunded status at September 30, 2016, before tax adjustments $ (52,419 ) Regulatory assets related to pensions (1) : Regulatory assets at December 31, 2015, before tax adjustments $ 235,094 Amount reclassified through net benefit cost: Amortization of prior service cost (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at March 31, 2016, before tax adjustments $ 230,324 Amount reclassified through net benefit cost: Amortization of prior service cost $ (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at June 30, 2016, before tax adjustments $ 225,554 Amount reclassified through net benefit cost: Amortization of prior service cost $ (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at September 30, 2016, before tax adjustments $ 220,784 (1) Amounts that would otherwise be charged/credited to Accumulated Other Comprehensive Income or Loss upon application of ASC 715, “Compensation – Retirement Benefits,” are recorded as a regulatory asset or liability because IPL has historically recovered and currently recovers pension and other postretirement benefit expenses in rates. These are unrecognized amounts yet to be recognized as components of net periodic benefit costs. 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, 2016 2015 2016 2015 (In Thousands) (In Thousands) Components of net periodic benefit cost: Service cost $ 1,754 $ 2,079 $ 5,263 $ 6,236 Interest cost 6,454 7,411 19,362 22,227 Expected return on plan assets (10,873 ) (11,204 ) (32,620 ) (33,616 ) Amortization of prior service cost 1,296 1,217 3,888 3,650 Amortization of actuarial loss 3,474 3,470 10,422 10,420 Recognized settlement loss — 206 — 206 Net periodic benefit cost $ 2,105 $ 3,179 $ 6,315 $ 9,123 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 were $4.8 million and $4.5 million at September 30, 2016 and December 31, 2015 , respectively. The related expense was not material to the Financial Statements in the periods covered by this report.

Commitments And Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2016
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 of IPALCO. 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 hazardous materials; 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 assure 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 alleges 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 nonattainment New Source Review 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, EPA issued a NOV pursuant to CAA Section 113(a) alleging violations of New Source Review and other CAA regulations, the Indiana SIP, and the Title V operating permit at Petersburg Generating Station. Since receiving the letters, IPL management has met with the EPA staff regarding possible resolutions of the NOVs. Settlements and litigated outcomes of similar New Source Review cases have required companies to pay civil penalties, install additional pollution control technology on coal-fired electric generating units, retire existing generating units, and invest in additional environmental projects. A similar outcome in these cases could have a material impact on our business. It is too early to determine whether these NOVs could have a material impact on our business, financial condition or results of operations. We would seek recovery of any operating or capital expenditures, but not fines or penalties, related to air pollution control technology to reduce regulated air emissions; however, there can be no assurances that we would be successful in this regard. IPL has recorded a contingent liability related to these New Source Review and other CAA NOV matters.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Service Company Effective January 1, 2014, the Service Company began providing services including operations, accounting, legal, human resources, information technology and other corporate services on behalf of companies that are part of the U.S. SBU, including among other companies, IPALCO and IPL. The Service Company allocates the costs for these services based on cost drivers designed to result in fair and equitable allocations. This includes ensuring that the regulated utilities served, including IPL, are not subsidizing costs incurred for the benefit of non-regulated businesses. Total costs incurred by the Service Company on behalf of IPALCO were $20.5 million and $18.3 million during the nine-month periods ended September 30, 2016 and 2015 , respectively, and were included in “ Other operating expenses ” on our Unaudited Condensed Consolidated Statements of Operations. Total costs incurred by IPALCO on behalf of the Service Company were $6.5 million and $5.6 million during the nine-month periods ended September 30, 2016 and 2015 , respectively. IPALCO had a prepaid balance with the Service Company of $4.4 million and $1.2 million as of September 30, 2016 and December 31, 2015 , respectively. CDPQ Please refer to Note 4, “Equity” for further details. Other In 2014, IPL engaged a third party vendor as part of its replacement generation construction projects. A member of the AES Board of Directors is also currently a member of the Supervisory Board of this vendor. IPL had billings from this vendor of $190.0 million and $152.9 million during the nine-month periods ended September 30, 2016 and 2015, respectively. IPL had a payable balance to this vendor of $6.8 million and $34.0 million as of September 30, 2016 and December 31, 2015, respectively.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Information	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 non-utility business activities aggregated separately. The non-utility category primarily includes the 2018 IPALCO Notes and the 2020 IPALCO Notes; approximately $12.9 million and $1.7 million of cash and cash equivalents, as of September 30, 2016 and December 31, 2015 , respectively; long-term investments of $5.2 million at both September 30, 2016 and December 31, 2015 ; and income taxes, deferred taxes, and interest related to those items. All other non-utility assets represented less than 1% of IPALCO’s total assets as of September 30, 2016 and December 31, 2015 . Net income for the utility segment was $122.0 million and $80.2 million for the nine-month periods ended September 30, 2016 and 2015, respectively, and $51.9 million and $35.2 million for the three-month periods ended September 30, 2016 and 2015 , respectively. The accounting policies of the identified segment are consistent with those policies and procedures described in the summary of significant accounting policies. Intersegment sales, if any, are generally based on prices that reflect the current market conditions.

Overview and Summary Of Signi16

Overview and Summary Of Significant Accounting Policies (Policy)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
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.
New Accounting Pronouncements	New Accounting Pronouncements The following table provides a brief description of recent accounting pronouncements that had and/or could have a material impact on the Company’s consolidated financial statements. 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 consolidated financial statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2015-03, 2015-15, Interest - Imputation of Interest (Subtopic 835-30) These standards simplify the presentation of debt issuance costs by requiring that debt issuance costs related to a tranche of debt be presented on the balance sheet as a direct deduction from the carrying amount of that debt, consistent with debt discounts. Debt issuance costs related to a line-of-credit can still be presented as an asset and subsequently amortized over the term of the line-of-credit, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The recognition and measurement guidance for debt issuance costs are not affected by the standard. Transition method: retrospective. January 1, 2016 Deferred financing costs of approximately $20.8 million previously classified within Deferred Debits were reclassified to reduce the related debt liabilities as of December 31, 2015. 2015-02, Consolidation - Amendments to the Consolidation Analysis (Topic 810) The standard makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the VIE guidance. The standard amends the evaluation of whether (1) fees paid to a decision-maker or service providers represent a variable interest, (2) a limited partnership or similar entity has the characteristics of a VIE and (3) a reporting entity is the primary beneficiary of a VIE. Transition method: retrospective. January 1, 2016 There were no changes to the consolidation conclusions. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2016-17, Consolidation (Topic 810): Interest Held Through Related Parties that are Under Common Control This standard amends the evaluation of whether a reporting entity is the primary beneficiary of a VIE by amending how a reporting entity, that is a single decision maker of a VIE, treats indirect interests in that entity held through related parties that are under common control. Transition method: retrospectively. January 1, 2017 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory This standard requires that an entity recognizes the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Transition method: modified retrospective method. January 1, 2018 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) This standard provides specific guidance on how certain cash transactions are presented and classified in the statement of cash flows. Transition method: various. January 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard, but does not anticipate a material impact on its consolidated financial statements. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This standard updates the impairment model for financial assets measured at amortized cost to an expected loss model rather than an incurred loss model. It also allows for the presentation of credit losses on available-for-sale debt securities as an allowance rather than a write down. Transition method: various. January 1, 2020 Early adoption is permitted only as of January 1, 2019. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting The standard simplifies the following aspects of accounting for share-based payment awards: accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities and classification of employee taxes paid on statement of cash flows when an employer withholds shares for tax-withholding purposes. Transition method: Various. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-02, Leases (Topic 842) The standard creates Topic 842, Leases, which supersedes Topic 840, Leases. It introduces a lessee model that brings substantially all leases onto the balance sheet while retaining most of the principles of the existing lessor model in U.S. GAAP and aligning many of those principles with ASC 606, Revenue from Contracts with Customers. Transition method: modified retrospective approach with certain practical expedients. January 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory The standard replaces the current lower of cost or market test with a lower of cost or net realizable value test. Transition method: prospectively. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2014-09, 2015-14, 2016-08, 2016-10, 2016-12 Revenue from Contracts with Customers (Topic 606) The Revenue from Contracts with Customers standard provides a single and comprehensive revenue recognition model for all contracts with customers to improve comparability. The standard contains principles to determine the measurement and timing of revenue recognition. The standard requires an entity to recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The amendments to the standard provide further clarification on contract revenue recognition specifically related to the implementation of the principal versus agent evaluation, the identification of performance obligations, clarification on accounting for licenses of intellectual property, and allows for the election to account for shipping and handling activities performed after control of a good has been transferred to the customer as a fulfillment cost. Transition method: a full retrospective or modified retrospective approach. January 1, 2018. Early application is permitted only as of January 1, 2017. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements.

Overview and Summary Of Signi17

Overview and Summary Of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements	The following table provides a brief description of recent accounting pronouncements that had and/or could have a material impact on the Company’s consolidated financial statements. 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 consolidated financial statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2015-03, 2015-15, Interest - Imputation of Interest (Subtopic 835-30) These standards simplify the presentation of debt issuance costs by requiring that debt issuance costs related to a tranche of debt be presented on the balance sheet as a direct deduction from the carrying amount of that debt, consistent with debt discounts. Debt issuance costs related to a line-of-credit can still be presented as an asset and subsequently amortized over the term of the line-of-credit, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The recognition and measurement guidance for debt issuance costs are not affected by the standard. Transition method: retrospective. January 1, 2016 Deferred financing costs of approximately $20.8 million previously classified within Deferred Debits were reclassified to reduce the related debt liabilities as of December 31, 2015. 2015-02, Consolidation - Amendments to the Consolidation Analysis (Topic 810) The standard makes targeted amendments to the current consolidation guidance and ends the deferral granted to investment companies from applying the VIE guidance. The standard amends the evaluation of whether (1) fees paid to a decision-maker or service providers represent a variable interest, (2) a limited partnership or similar entity has the characteristics of a VIE and (3) a reporting entity is the primary beneficiary of a VIE. Transition method: retrospective. January 1, 2016 There were no changes to the consolidation conclusions. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2016-17, Consolidation (Topic 810): Interest Held Through Related Parties that are Under Common Control This standard amends the evaluation of whether a reporting entity is the primary beneficiary of a VIE by amending how a reporting entity, that is a single decision maker of a VIE, treats indirect interests in that entity held through related parties that are under common control. Transition method: retrospectively. January 1, 2017 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory This standard requires that an entity recognizes the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Transition method: modified retrospective method. January 1, 2018 Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Receipts and Cash Payments (a consensus of the Emerging Issues Task Force) This standard provides specific guidance on how certain cash transactions are presented and classified in the statement of cash flows. Transition method: various. January 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard, but does not anticipate a material impact on its consolidated financial statements. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments This standard updates the impairment model for financial assets measured at amortized cost to an expected loss model rather than an incurred loss model. It also allows for the presentation of credit losses on available-for-sale debt securities as an allowance rather than a write down. Transition method: various. January 1, 2020 Early adoption is permitted only as of January 1, 2019. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting The standard simplifies the following aspects of accounting for share-based payment awards: accounting for income taxes, classification of excess tax benefits on the statement of cash flows, forfeitures, statutory tax withholding requirements, classification of awards as either equity or liabilities and classification of employee taxes paid on statement of cash flows when an employer withholds shares for tax-withholding purposes. Transition method: Various. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-02, Leases (Topic 842) The standard creates Topic 842, Leases, which supersedes Topic 840, Leases. It introduces a lessee model that brings substantially all leases onto the balance sheet while retaining most of the principles of the existing lessor model in U.S. GAAP and aligning many of those principles with ASC 606, Revenue from Contracts with Customers. Transition method: modified retrospective approach with certain practical expedients. January 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory The standard replaces the current lower of cost or market test with a lower of cost or net realizable value test. Transition method: prospectively. January 1, 2017. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2014-09, 2015-14, 2016-08, 2016-10, 2016-12 Revenue from Contracts with Customers (Topic 606) The Revenue from Contracts with Customers standard provides a single and comprehensive revenue recognition model for all contracts with customers to improve comparability. The standard contains principles to determine the measurement and timing of revenue recognition. The standard requires an entity to recognize revenue to depict the transfer of goods or services to customers at an amount that the entity expects to be entitled to in exchange for those goods or services. The amendments to the standard provide further clarification on contract revenue recognition specifically related to the implementation of the principal versus agent evaluation, the identification of performance obligations, clarification on accounting for licenses of intellectual property, and allows for the election to account for shipping and handling activities performed after control of a good has been transferred to the customer as a fulfillment cost. Transition method: a full retrospective or modified retrospective approach. January 1, 2018. Early application is permitted only as of January 1, 2017. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements.

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2016
Regulated Operations [Abstract]
Schedule Of Regulatory Assets And Liabilities	The amounts of regulatory assets and regulatory liabilities are as follows: September 30, 2016 December 31, 2015 Recovery Period (In Thousands) Regulatory Assets Current: Undercollections of rate riders $ 14,101 $ 8,002 Approximately 1 year (1) Costs being recovered through base rates 13,953 — Approximately 1 year (1) Total current regulatory assets $ 28,054 $ 8,002 Long-term: Unrecognized pension and other postretirement benefit plan costs $ 213,102 $ 226,889 Various (2) Income taxes recoverable through rates 44,906 35,765 Various Deferred MISO costs 117,301 128,610 Through 2026 (3) Unamortized Petersburg Unit 4 carrying charges and certain other costs 10,457 11,248 Through 2026 (1) (4) Unamortized reacquisition premium on debt 22,290 23,268 Over remaining life of debt Environmental projects 32,522 16,876 Through 2050 (1)(4) Other miscellaneous 3,921 5,544 To be determined (1)(5) Total long-term regulatory assets $ 444,499 $ 448,200 Total regulatory assets $ 472,553 $ 456,202 Regulatory Liabilities Current: Overcollections of rate riders $ 7,881 $ 24,019 Approximately 1 year (1) FTRs 7,428 4,150 Approximately 1 year (1) Total current regulatory liabilities $ 15,309 $ 28,169 Long-term: ARO and accrued asset removal costs $ 656,711 $ 637,065 Not Applicable Unamortized investment tax credit 1,872 2,451 Through 2021 Total long-term regulatory liabilities $ 658,583 $ 639,516 Total regulatory liabilities $ 673,892 $ 667,685 (1) Recovered (credited) per specific rate orders (2) IPL receives a return on its discretionary funding (3) The majority of these costs are being recovered per specific rate order; for the remaining costs recovery is probable but timing not yet determined (4) Recovered with a current return (5) A portion of this amount will be recovered over the next two years

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
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, 2016 December 31, 2015 Face Value Fair Value Face Value Fair Value (In Millions) Fixed-rate $ 2,438.5 $ 2,710.8 $ 2,088.4 $ 2,225.3 Variable-rate 115.0 115.0 256.9 256.9 Total indebtedness $ 2,553.5 $ 2,825.8 $ 2,345.3 $ 2,482.2

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule Long-Term Indebtedness	The following table presents our long-term debt: September 30, December 31, Series Due 2016 2015 (In Thousands) IPL first mortgage bonds: 5.40% (1) August 2017 $ 24,650 $ 24,650 3.875% (2) August 2021 55,000 55,000 3.875% (2) August 2021 40,000 40,000 4.55% (2) 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 — Unamortized discount – net (6,508 ) (4,242 ) Deferred financing costs (3) (18,043 ) (13,703 ) Total IPL first mortgage bonds 1,608,899 1,265,505 IPL unsecured debt: Variable (4) December 2020 30,000 30,000 Variable (4) December 2020 60,000 60,000 Total IPL unsecured debt 90,000 90,000 Total Long-term Debt – IPL 1,698,899 1,355,505 Long-term Debt – IPALCO: 5.00% Senior Secured Notes May 2018 400,000 400,000 3.45% Senior Secured Notes July 2020 405,000 405,000 Unamortized discount – net (311 ) (371 ) Deferred financing costs (3) (5,475 ) (6,858 ) Total Long-term Debt – IPALCO 799,214 797,771 Total Consolidated IPALCO Long-term Debt $ 2,498,113 $ 2,153,276 Less: Current Portion of Long-term Debt 24,650 — Net Consolidated IPALCO Long-term Debt $ 2,473,463 $ 2,153,276 (1) First mortgage bonds are issued to the city of Petersburg, Indiana, to secure the loan of proceeds from tax-exempt bonds issued by the city. (2) First mortgage bonds are issued to the Indiana Finance Authority, to secure the loan of proceeds from tax-exempt bonds issued by the Indiana Finance Authority. (3) The Company adopted ASU No. 2015-03 on January 1, 2016, which requires the use of the full retrospective approach with respect to the presentation of debt issuance costs, including deferred charges. (4) Unsecured notes are 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.

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Schedule Of Defined Benefit Plans Disclosures	The following table (in thousands) presents information for the nine months ended September 30, 2016 , relating to the Pension Plans: Net unfunded status of plans: Net unfunded status at December 31, 2015, before tax adjustments $ (76,314 ) Net benefit cost components reflected in net unfunded status during first quarter: Service cost (1,754 ) Interest cost (6,454 ) Expected return on assets 10,873 Employer contributions 15,900 Net unfunded status at March 31, 2016, before tax adjustments $ (57,749 ) Net benefit cost components reflected in net unfunded status during second quarter: Service cost $ (1,755 ) Interest cost (6,454 ) Expected return on assets 10,874 Net unfunded status at June 30, 2016, before tax adjustments $ (55,084 ) Net benefit cost components reflected in net unfunded status during third quarter: Service cost $ (1,754 ) Interest cost (6,454 ) Expected return on assets 10,873 Net unfunded status at September 30, 2016, before tax adjustments $ (52,419 ) Regulatory assets related to pensions (1) : Regulatory assets at December 31, 2015, before tax adjustments $ 235,094 Amount reclassified through net benefit cost: Amortization of prior service cost (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at March 31, 2016, before tax adjustments $ 230,324 Amount reclassified through net benefit cost: Amortization of prior service cost $ (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at June 30, 2016, before tax adjustments $ 225,554 Amount reclassified through net benefit cost: Amortization of prior service cost $ (1,296 ) Amortization of net actuarial loss (3,474 ) Regulatory assets at September 30, 2016, before tax adjustments $ 220,784 (1) Amounts that would otherwise be charged/credited to Accumulated Other Comprehensive Income or Loss upon application of ASC 715, “Compensation – Retirement Benefits,” are recorded as a regulatory asset or liability because IPL has historically recovered and currently recovers pension and other postretirement benefit expenses in rates. These are unrecognized amounts yet to be recognized as components of net periodic benefit costs.
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, 2016 2015 2016 2015 (In Thousands) (In Thousands) Components of net periodic benefit cost: Service cost $ 1,754 $ 2,079 $ 5,263 $ 6,236 Interest cost 6,454 7,411 19,362 22,227 Expected return on plan assets (10,873 ) (11,204 ) (32,620 ) (33,616 ) Amortization of prior service cost 1,296 1,217 3,888 3,650 Amortization of actuarial loss 3,474 3,470 10,422 10,420 Recognized settlement loss — 206 — 206 Net periodic benefit cost $ 2,105 $ 3,179 $ 6,315 $ 9,123

Overview and Summary of Signi22

Overview and Summary of Significant Accounting Policies (Details) customer in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)customergenerating_stationmiMW	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Distance of furthest customer from Indianapolis | mi	40
Number of generating stations | generating_station	4
Deferred financing costs	$ 23,500	$ 20,800
Adjustments for New Accounting Pronouncement [Member]
Debt Instrument [Line Items]
Deferred financing costs		(20,800)
Aes U.S. Investments [Member]
Debt Instrument [Line Items]
Ownership percentage by parent (percent)	82.35%
CDPQ [Member]
Debt Instrument [Line Items]
Ownership percentage by parent (percent)	17.65%
Ownership interest in parent company (percent)	15.00%
Percentage of direct and indirect ownership share of IPALCO	30.00%
AES U.S. Holdings, LLC [Member]
Debt Instrument [Line Items]
Ownership interest in parent company (percent)	85.00%
Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
Number of customers | customer	480
Electric generation capability for winter, megawatts | MW	2,993
Electric generation capability for summer, megawatts | MW	2,878
Deferred financing costs	$ 18,043	13,703
Deferred Debits [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Deferred financing costs		$ 300

Regulatory Matters (Details)

Regulatory Matters (Details) $ in Thousands	1 Months Ended		9 Months Ended
	Mar. 31, 2016USD ($)	May 31, 2014MW	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Regulatory Matters [Line Items]
Approved increase to basic rates and charges	$ 30,800
Wholesale sales margins, percent shared with customers	50.00%
Total current regulatory assets			$ 28,054	$ 8,002
Total long-term regulatory assets			444,499	448,200
Total regulatory assets			472,553	456,202
Total current regulatory liabilities			15,309	28,169
Total long-term regulatory liabilities			658,583	639,516
Total regulatory liabilities			673,892	667,685
Deferred fuel [Member]
Regulatory Matters [Line Items]
Total current regulatory liabilities			$ 7,881	24,019
Regulatory liability recovery period			1 year
FTRs [Member]
Regulatory Matters [Line Items]
Total current regulatory liabilities			$ 7,428	4,150
Regulatory liability recovery period			1 year
DSM program costs [Member]
Regulatory Matters [Line Items]
Regulatory liability recovery period			1 year
ARO and accrual asset removal costs [Member]
Regulatory Matters [Line Items]
Total long-term regulatory liabilities			$ 656,711	637,065
Unamortized investment tax credit [Member]
Regulatory Matters [Line Items]
Total long-term regulatory liabilities			1,872	2,451
Undercollections of rate riders [Member]
Regulatory Matters [Line Items]
Total current regulatory assets			14,101	8,002
Amounts being recovered through base rates [Member]
Regulatory Matters [Line Items]
Total current regulatory assets			13,953	0
Environmental projects [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			$ 32,522	16,876
Regulatory asset recovery period			1 year
Deferred MISO Non-fuel Costs [Member]
Regulatory Matters [Line Items]
Total current regulatory assets			$ 11,800
Regulatory asset recovery period			1 year
Other Miscellaneous [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			$ 3,921	5,544
Regulatory asset recovery period			1 year
Unrecognized oension and other postretirement benefit plan costs [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			$ 213,102	226,889
Income taxes recoverable through rates [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			44,906	35,765
Deferred MISO Costs [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			117,301	128,610
Total regulatory assets			117,700
Unamortized Petersburg Unit 4 carrying charges and certain other costs [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			10,457	11,248
Unamortized reacquisition premium on debt [Member]
Regulatory Matters [Line Items]
Total long-term regulatory assets			$ 22,290	$ 23,268
Long-term Other Miscellaneous [Member]
Regulatory Matters [Line Items]
Regulatory asset recovery period			2 years
Eagle Valley [Member]
Regulatory Matters [Line Items]
Public Utilities, Approved Production Plant Capacity, Minimum | MW		644
Public Utilities, Approved Production Plan Capacity , Maximum | MW		685
Increase to Annual Depreciation Rate [Member]
Regulatory Matters [Line Items]
Approved increase to basic rates and charges	$ 24,300

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Asset retirement obligations	$ 58,581	$ 58,986
Unamortized deferred financing costs	23,500	20,800
Unamortized debt discount	$ 6,800	$ 4,600

Fair Value (Schedule Of Face An

Fair Value (Schedule Of Face And Fair Value Of Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Face Value	$ 2,553.5	$ 2,345.3
Fair Value	2,825.8	2,482.2
Fixed Rate [Member]
Debt Instrument [Line Items]
Face Value	2,438.5	2,088.4
Fair Value	2,710.8	2,225.3
Variable Rate [Member]
Debt Instrument [Line Items]
Face Value	115	256.9
Fair Value	$ 115	$ 256.9

Equity (Details)

Equity (Details) - USD ($) $ in Thousands	Jun. 01, 2016	Mar. 01, 2016	Apr. 01, 2015	Feb. 11, 2015	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Proceeds from Contributions from Parent						$ 0
Proceeds from Contributed Capital					$ 78,738
Common Stock [Member]
Class of Stock [Line Items]
Number of shares issued and sold (shares)		7,403,213	11,818,828	100
Value of shares issued and sold		$ 134,300	$ 214,400
CDPQ [Member]
Class of Stock [Line Items]
Percentage of direct and indirect ownership share of IPALCO					30.00%
Parent Company [Member]
Class of Stock [Line Items]
Proceeds from Contributions from Parent	$ 64,800
Shareholder [Member]
Class of Stock [Line Items]
Proceeds from Contributed Capital	$ 13,900

Debt (Schedule Long-Term Indebt

Debt (Schedule Long-Term Indebtedness) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	May 31, 2016	Dec. 31, 2015	Sep. 30, 2015
Debt Instrument [Line Items]
Unamortized discount - net	$ (6,800)		$ (4,600)
Deferred financing costs	(23,500)		(20,800)
Long-term debt	2,498,113		2,153,276
Net Consolidated IPALCO Long-term Debt	2,473,463		2,153,276
Long-term Debt, Current Maturities	24,650		0
Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
First mortgage bonds	1,608,899		1,265,505
Unamortized discount - net	(6,508)		(4,242)
Deferred financing costs	(18,043)		(13,703)
Long-term debt	1,698,899		1,355,505
Unsecured Debt	$ 90,000		90,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 5.40% Due August 2017 [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	5.40%
Debt due date	Aug. 1, 2017
First mortgage bonds	$ 24,650		24,650
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%
Debt due date	Aug. 1, 2021
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%
Debt due date	Aug. 1, 2021
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	4.55%
Debt due date	Dec. 1, 2024
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%
Debt due date	Jan. 1, 2034
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%
Debt due date	Oct. 1, 2036
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%
Debt due date	Jun. 1, 2037
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%
Debt due date	Nov. 1, 2041
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%
Debt due date	Jun. 1, 2043
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%
Debt due date	Jun. 1, 2044
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%			4.70%
Debt due date	Sep. 1, 2045
First mortgage bonds	$ 260,000		260,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.05% Due May 2046
Debt Instrument [Line Items]
Debt, stated interest rate	4.05%	4.05%
Debt due date	May 1, 2046
First mortgage bonds	$ 350,000		0
Indianapolis Power And Light Company [Member] | Environmental Facilities Refunding Revenue Notes, Series 2015A [Member]
Debt Instrument [Line Items]
Debt due date	Dec. 22, 2020
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 due date	Dec. 22, 2020
Unsecured Debt	$ 60,000		60,000
Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Unamortized discount - net	(311)		(371)
Deferred financing costs	(5,475)		(6,858)
Net Consolidated IPALCO Long-term Debt	$ 799,214		797,771
Ipalco Enterprises, Inc. [Member] | 5.00% Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	5.00%
Debt due date	May 1, 2018
Long-term debt	$ 400,000		400,000
Ipalco Enterprises, Inc. [Member] | 3.45% Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt, stated interest rate	3.45%
Debt due date	Jul. 1, 2020
Long-term debt	$ 405,000		$ 405,000

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	May 31, 2016	Sep. 30, 2015	Jun. 30, 2015	May 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	May 17, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Net Income (Loss) Attributable to Parent					$ 47,256,000	$ 28,646,000	$ 104,733,000	$ 45,590,000
Long-term Debt					2,498,113,000		2,498,113,000			$ 2,153,276,000
Gains (Losses) on Extinguishment of Debt					0	(2,728,000)	0	(22,051,000)
Proceeds from Issuance of First Mortgage Bond					2,553,500,000		2,553,500,000			2,345,300,000
Line of credit facility, term				5 years
Maximum borrowing capacity				$ 250,000,000
Line of credit facility, accordion feature				$ 150,000,000
Line of credit, outstanding borrowings					25,000,000		$ 25,000,000			75,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Debt instrument, maturity date							Oct. 16, 2020
Indianapolis Power And Light Company [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 1,698,899,000		$ 1,698,899,000			1,355,505,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond 4.05% Due May 2046
Debt Instrument [Line Items]
Proceeds from Issuance of First Mortgage Bond									$ 350,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.05%				4.05%		4.05%
Debt instrument, maturity date							May 1, 2046
Proceeds from Issuance of Secured Debt	$ 343,600,000
Indianapolis Power And Light Company [Member] | First Mortgage Bond Nineteen [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of First Mortgage Bond	350,000,000	$ 260,000,000				$ 260,000,000		$ 260,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.70%			4.70%	4.70%	4.70%	4.70%
Debt instrument, maturity date							Sep. 1, 2045
Proceeds from Issuance of Secured Debt		$ 255,600,000
Parent Company [Member] | Seven Point Two Five Percent Senior Secured Notes [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 33,500,000
Extinguishment of Debt, Amount			$ 366,500,000
Parent Company [Member] | Three Point Four Five Percent Senior Secured Notes [Member]
Debt Instrument [Line Items]
Long-term Debt					$ 405,000,000		$ 405,000,000			$ 405,000,000
Debt Instrument, Interest Rate, Stated Percentage					3.45%		3.45%
Debt instrument, maturity date							Jul. 1, 2020
Debt Instrument, Ratio of Principal to Public Offering Price			99.929%
Proceeds from Issuance of Secured Debt			$ 399,500,000
Other Nonoperating Income (Expense) [Member] | Parent Company [Member] | Seven Point Two Five Percent Senior Secured Notes [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt			$ (22,100,000)
Medium-term Notes [Member] | Indianapolis Power And Light Company [Member] | Unsecured 364-day Taxable Term Loan [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of First Mortgage Bond	$ 91,900,000
Line of credit facility, term	364 days
Utility Segment [Member]
Debt Instrument [Line Items]
Net Income (Loss) Attributable to Parent					$ 51,900,000	$ 35,200,000	$ 122,000,000	$ 80,200,000

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
State and federal income tax rate	35.00%	36.30%	33.90%	36.00%

Benefit Plans (Narrative) (Deta

Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Postretirement Health Care Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Unfunded obligation	$ 4.8	$ 4.5

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, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net Unfunded Status of Plans [Roll Forward]
Net funded status before tax adjustments	$ (55,084)	$ (57,749)	$ (76,314)		$ (76,314)
Service cost	(1,754)	(1,755)	(1,754)	$ (2,079)	(5,263)	$ (6,236)
Interest cost	(6,454)	(6,454)	(6,454)	(7,411)	(19,362)	(22,227)
Expected return on assets	10,873	10,874	10,873	11,204	32,620	33,616
Employer contributions			15,900
Net funded status before tax adjustments	(52,419)	(55,084)	(57,749)		(52,419)
Regulatory Assets Related to Pensions [Roll Forward]
Regulatory assets before tax adjustments			456,202		456,202
Amortization of prior service cost	(1,296)			(1,217)	(3,888)	(3,650)
Amortization of net actuarial loss	(3,474)			$ (3,470)	(10,422)	$ (10,420)
Regulatory assets before tax adjustments	472,553				472,553
Pension Plan [Member]
Regulatory Assets Related to Pensions [Roll Forward]
Regulatory assets before tax adjustments	225,554	230,324	235,094		235,094
Amortization of prior service cost	(1,296)	(1,296)	(1,296)
Amortization of net actuarial loss	(3,474)	(3,474)	(3,474)
Regulatory assets before tax adjustments	$ 220,784	$ 225,554	$ 230,324		$ 220,784

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, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 1,754	$ 1,755	$ 1,754	$ 2,079	$ 5,263	$ 6,236
Interest cost	6,454	6,454	6,454	7,411	19,362	22,227
Expected return on assets	(10,873)	$ (10,874)	$ (10,873)	(11,204)	(32,620)	(33,616)
Amortization of prior service cost	1,296			1,217	3,888	3,650
Amortization of actuarial loss	3,474			3,470	10,422	10,420
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0			(206)	0	(206)
Net periodic benefit cost	$ 2,105			$ 3,179	$ 6,315	$ 9,123

Commitments and Contingencies (

Commitments and Contingencies (Details)	1 Months Ended
	Oct. 31, 2009coal_fired_electric_generating_facility
Indianapolis Power And Light Company [Member]
Entity Information [Line Items]
Number of facilities with violations of Federal Clean Air Act	3

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Service Company [Member]
Related Party Transaction [Line Items]
Costs incurred by related party	$ 20.5	$ 18.3
Prepaid balance to related party	4.4		$ 1.2
Director [Member]
Related Party Transaction [Line Items]
Billings from related vendor	190	152.9
Accounts payable to related vendor	6.8		$ 34
Ipalco Enterprises, Inc. [Member]
Related Party Transaction [Line Items]
Costs incurred by related party	$ 6.5	$ 5.6

Segment Information (Details)

Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Cash	$ 12,900		$ 12,900		$ 1,700
Long-term nonutility investments	5,200		$ 5,200		$ 5,200
Nonutility assets representation rate (percentage, less than)			1.00%		1.00%
Net income	47,256	$ 28,646	$ 104,733	$ 45,590
Utility Segment [Member]
Debt Instrument [Line Items]
Net income	$ 51,900	$ 35,200	$ 122,000	$ 80,200

Uncategorized Items - cik000072

Label	Element	Value
Income Taxes Paid, Net	us-gaap_IncomeTaxesPaidNet	$ 0