Authority Remaining Available On Maximum Authorized Amount Of Debt To Be Refinanced

No definition available.

Name:	ipl_AuthorityRemainingAvailableOnMaximumAuthorizedAmountOfDebtToBeRefinanced
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Accordion Feature

+ References

No definition available.

+ Details

Name:	ipl_LineOfCreditFacilityAccordionFeature
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Term

+ References

No definition available.

+ Details

Name:	ipl_LineOfCreditFacilityTerm
Namespace Prefix:	ipl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum Authorized Amount Of Debt To Be Issued

+ References

No definition available.

+ Details

Name:	ipl_MaximumAuthorizedAmountOfDebtToBeIssued
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum Authorized Amount Of Debt To Be Refinanced

+ References

No definition available.

+ Details

Name:	ipl_MaximumAuthorizedAmountOfDebtToBeRefinanced
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Preferred Stock Issuable in Lieu of Portion of Maximum Authorized Amount of Debt

+ References

No definition available.

+ Details

Name:	ipl_PreferredStockIssuableinLieuofPortionofMaximumAuthorizedAmountofDebt
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Secured Debt Gross

+ References

No definition available.

+ Details

Name:	ipl_SecuredDebtGross
Namespace Prefix:	ipl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_UnsecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=ipl_ThreePointEightSevenFivePercentFirstMortgageBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FMBTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_EnvironmentalFacilitiesRefundingRevenueNotesSeries2015AMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_EnvironmentalFacilitiesRefundingRevenueNotesSeries2015BMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_ThreePointFourFivePercentSeniorSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_ThreePointSevenZeroPercentSeniorSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FMBTwentyoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_BankTermLoanMaturingJuly2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FirstMortgageBondSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_FMBTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_ThreePointEightSevenFivePercentFirstMortgageBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ipl_AggregatedPrincipalAmountOfFirstMortgageBondsToTheIndianaFinanceAuthorityInTwoSeriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
Debt (Narrative) (Details) - USD ($)	May 31, 2014	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Apr. 14, 2020
Debt Instrument [Line Items]
Secured debt gross		$ 2,683,800,000
Aggregate principal amount		2,758,800,000	$ 2,678,800,000
Net proceeds from debt issuance		564,568,000	0	$ 169,936,000
Line of credit facility, term	5 years
Long-term debt		2,651,185,000	2,651,629,000
Loss on early extinguishment of debt		2,424,000	0	0
Maximum borrowing capacity	$ 250,000,000	500,000,000
Line of Credit Facility, Remaining Borrowing Capacity		250,000,000.0
Maximum amount of short-term indebtedness outstanding		500,000,000
Authorized amount of debt to be issued		350,000,000
Authorized amount of debt to be refinanced		185,000,000
Preferred Stock Issuable in Lieu of Portion of Maximum Authorized Amount of Debt		65,000,000
Authority Remaining Available On Maximum Authorized Amount Of Debt To Be Refinanced		95,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, accordion feature	$ 150,000,000
Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Line of Credit		75,000,000.0	0.0
Indianapolis Power And Light Company
Debt Instrument [Line Items]
Secured debt gross		1,803,800,000
Aggregate principal amount		1,878,800,000	1,803,800,000
Unsecured Debt		0	89,886,000
Net proceeds from debt issuance		90,000,000	0	104,936,000
Line of credit facility, term	5 years
Long-term debt		1,780,410,000	1,780,901,000
Maximum borrowing capacity	$ 250,000,000	500,000,000
Line of Credit Facility, Remaining Borrowing Capacity		250,000,000.0
Maximum amount of short-term indebtedness outstanding		500,000,000
Authorized amount of debt to be issued		350,000,000
Authorized amount of debt to be refinanced		185,000,000
Preferred Stock Issuable in Lieu of Portion of Maximum Authorized Amount of Debt		65,000,000
First mortgage bonds		1,780,410,000	1,691,015,000
Authority Remaining Available On Maximum Authorized Amount Of Debt To Be Refinanced		$ 95,000,000
Indianapolis Power And Light Company \| Three Point Eight Seven Five Percent First Mortgage Bonds
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.875%
Indianapolis Power And Light Company \| Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, accordion feature	$ 150,000,000
Indianapolis Power And Light Company \| Line of Credit [Member]
Debt Instrument [Line Items]
Long-term Line of Credit		$ 75,000,000.0	0.0
Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Aggregate principal amount		880,000,000	875,000,000
Net proceeds from debt issuance		474,568,000	0	65,000,000
Early tender premium		(2,415,000)	0	0
Long-term debt		870,775,000	870,728,000
Loss on early extinguishment of debt		$ 2,415,000	0	$ 0
First Mortgage Bond Seven [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.875%
First mortgage bonds		$ 55,000,000	55,000,000
First Mortgage Bonds [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Secured debt gross		$ 1,803,800,000	1,803,800,000
FMB Twenty [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.05%
First mortgage bonds		$ 350,000,000	350,000,000
First Mortgage Bond Nine [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.125%
First mortgage bonds		$ 40,000,000	40,000,000
Environmental Facilities Refunding Revenue Notes, Series 2015A [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unsecured Debt		0	30,000,000
Environmental Facilities Refunding Revenue Notes, Series 2015B [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Unsecured Debt		$ 0	60,000,000
3.45% Senior Secured Notes [Member] \| Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.45%
Long-term debt		$ 0	405,000,000
First Mortgage Bond 4.65% Due June 2043 [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.65%
First mortgage bonds		$ 170,000,000	170,000,000
First Mortgage Bond 4.70% Due September 2045 [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.50%
First mortgage bonds		$ 130,000,000	130,000,000
First Mortgage Bond Nineteen [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.70%
First mortgage bonds		$ 260,000,000	260,000,000
Three Point Seven Zero Percent Senior Secured Notes [Domain] \| Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.70%
Long-term debt		$ 405,000,000	405,000,000
FMB Twenty - one [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.875%
First mortgage bonds		$ 105,000,000	105,000,000
Bank Term Loan Maturing July 2020 [Member] \| Ipalco Enterprises, Inc. [Member]
Debt Instrument [Line Items]
Long-term debt		$ 0	65,000,000		$ 65,000,000
First Mortgage Bond Eight [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		3.875%
First mortgage bonds		$ 40,000,000	40,000,000
First Mortgage Bond Thirteen [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		6.60%
First mortgage bonds		$ 100,000,000	100,000,000
First Mortgage Bond Fourteen [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		6.05%
First mortgage bonds		$ 158,800,000	158,800,000
First Mortgage Bond Fifteen [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		6.60%
First mortgage bonds		$ 165,000,000	165,000,000
First Mortgage Bond Sixteen [Member] \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.875%
First mortgage bonds		$ 140,000,000	140,000,000
FMB Twenty - three \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
Debt instrument, stated interest rate		0.95%
First mortgage bonds		$ 60,000,000	$ 0
Three Point Eight Seven Five Percent First Mortgage Bonds \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
First mortgage bonds		95,000,000
Aggregated Principal Amount of First Mortgage Bonds to the Indiana Finance Authority in Two Series \| Indianapolis Power And Light Company
Debt Instrument [Line Items]
First mortgage bonds		$ 90,000,000