General Description of the Plan (Details) - EBP 019	12 Months Ended
Dec. 31, 2025 USD ($) year	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Requisite number of days, after hire	60 days
Annual increase in automatic rate	0.01
Matched percentage	0.05
Supplemental compensation contributed maximum percentage	0.45
Annual company retirement contribution, percentage of base wage or salary	0.04
Employer and annual retirement contributions	$ 10,420,665	$ 8,643,866
Maximum percentage of account invested in fund	0.20
Vesting period	3 years
Minimum vesting age \| year	65
Minimum loan amount	$ 1,000
Loan amount, maximum percentage of account balance	50.00%
Maximum loan amount	$ 50,000
Interest rate	0.01
Maximum borrowing term, general loan	4 years 6 months
Maximum borrowing term, residential purchase loan	20 years
Involuntary cash-out limit	$ 7,000
Cumulative amount to be distributed	$ 14,436,105	7,202,123
Break in service, period	5 years
Forfeiture account balance	$ 16,743	21,058
Reduction in company matching contributions	$ 697,490	$ 437,220
Minimum
EBP, Description of Plan [Line Items]
Automatic rate	5.00%
Maximum
EBP, Description of Plan [Line Items]
Automatic rate	10.00%

BP, Employer Contribution Maximum Vesting Age

No definition available.

Name:	etr_BPEmployerContributionMaximumVestingAge
Namespace Prefix:	etr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution, Annual Fixed Rate Contribution, Percentage

+ References

No definition available.

+ Details

Name:	etr_EBPEmployerContributionAnnualFixedRateContributionPercentage
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution, Break In Service, Period

+ References

No definition available.

+ Details

Name:	etr_EBPEmployerContributionBreakInServicePeriod
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

Name:	etr_EBPEmployerContributionVestingServicePeriod
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Inactive Accounts, Cumulative Distributions To Participants

+ References

No definition available.

+ Details

Name:	etr_EBPInactiveAccountsCumulativeDistributionsToParticipants
Namespace Prefix:	etr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

EBP, Investment, Participant, Percentage Of Investment In Fund, Maximum

+ References

No definition available.

+ Details

Name:	etr_EBPInvestmentParticipantPercentageOfInvestmentInFundMaximum
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Involuntary Cash-Out Limit

+ References

No definition available.

+ Details

Name:	etr_EBPInvoluntaryCashOutLimit
Namespace Prefix:	etr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	etr_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term

+ References

No definition available.

+ Details

Name:	etr_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate

+ References

No definition available.

+ Details

Name:	etr_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Maximum Annual Contribution to Eligible Compensation, Percentage

+ References

No definition available.

+ Details

Name:	etr_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Pretax, Maximum Annual Supplemental Compensation to Total Compensation, Percentage

+ References

No definition available.

+ Details

Name:	etr_EBPParticipantContributionPretaxMaximumAnnualSupplementalCompensationToTotalCompensationPercentage
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

Name:	etr_EBPParticipantLoanBasisSpreadOnVariableRate
Namespace Prefix:	etr_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Requisite Service Period

+ References

No definition available.

+ Details

Name:	etr_EBPRequisiteServicePeriod
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of contribution receivable from employer of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule II))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478642/962-310-45-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from employer contribution.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=etr_EBP019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: