EBP, Distributions, Balance Threshold For Direct Rollover To Other Retirement Account

No definition available.

Name:	cnp_EBPDistributionsBalanceThresholdForDirectRolloverToOtherRetirementAccount
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

EBP, Employer Contribution, Participant Compensation Matched, Amount

+ References

No definition available.

+ Details

Name:	cnp_EBPEmployerContributionParticipantCompensationMatchedAmount
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Employer Contribution Vesting Percentage

+ References

No definition available.

+ Details

Name:	cnp_EBPEmployerContributionVestingPercentage
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

Name:	cnp_EBPEmployerContributionVestingServicePeriod
Namespace Prefix:	cnp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Non-Elective Contribution, Percentage

+ References

No definition available.

+ Details

Name:	cnp_EBPEmployerNonElectiveContributionPercentage
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Forfeited Nonvested Account, Decrease From Administrative Expense And Employer Contributions

+ References

No definition available.

+ Details

Name:	cnp_EBPForfeitedNonvestedAccountDecreaseFromAdministrativeExpenseAndEmployerContributions
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Investment, Self-Directed Brokerage Account, Future Contributions, Election Percentage

+ References

No definition available.

+ Details

Name:	cnp_EBPInvestmentSelfDirectedBrokerageAccountFutureContributionsElectionPercentage
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Investment, Self-Directed Brokerage Account, Minimum Investment

+ References

No definition available.

+ Details

Name:	cnp_EBPInvestmentSelfDirectedBrokerageAccountMinimumInvestment
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

EBP, Note Receivable from Participant, Account, Maximum Repayment Period

+ References

No definition available.

+ Details

Name:	cnp_EBPNoteReceivableFromParticipantAccountMaximumRepaymentPeriod
Namespace Prefix:	cnp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable from Participant, Account, Origination Fee

+ References

No definition available.

+ Details

Name:	cnp_EBPNoteReceivableFromParticipantAccountOriginationFee
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

EBP, Participant Contribution, After-Tax, Maximum Annual Compensation to Total Compensation, Percentage

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionAfterTaxMaximumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionAutomaticAnnualIncreaseDeferralRate
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Automatic Enrollment, Opt Out Period

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionAutomaticEnrollmentOptOutPeriod
Namespace Prefix:	cnp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Participant Contribution, Investment Direction, Incremental Rate

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionInvestmentDirectionIncrementalRate
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Contribution, Pretax, Maximum Annual Compensation To Eligible Bonus Compensation, Percentage

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionPretaxMaximumAnnualCompensationToEligibleBonusCompensationPercentage
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant, Contributions, Maximum Contributions To Be Invested In Employer Common Stock Fund, Percent

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantContributionsMaximumContributionsToBeInvestedInEmployerCommonStockFundPercent
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant, Investments, Maximum Investment In Employer Common Stock Fund, Percent

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantInvestmentsMaximumInvestmentInEmployerCommonStockFundPercent
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Participant Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

Name:	cnp_EBPParticipantLoanBasisSpreadOnVariableRate
Namespace Prefix:	cnp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Withdrawing Participant, Minimum Account Balance, Threshold

+ References

No definition available.

+ Details

Name:	cnp_EBPWithdrawingParticipantMinimumAccountBalanceThreshold
Namespace Prefix:	cnp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Participant Contribution, After Tax Contributions, Service Period Threshold

+ References

No definition available.

+ Details

Name:	cnp_ParticipantContributionAfterTaxContributionsServicePeriodThreshold
Namespace Prefix:	cnp_
Data Type:	xbrli:durationItemType
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

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

Percentage of employer matching contribution on eligible participant contribution to 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

+ Details

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

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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=cnp_EBP015Member
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:

- Details

Name:	cnp_EBPEmployerContributionEmployeeTypeAxis=cnp_EBPParticipantGrandfatheredNonBargainingRetirementPlanParticipantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cnp_EBPEmployerContributionEmployeeTypeAxis=cnp_EBPParticipantBargainingRetirementPlanParticipantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cnp_EBPEmployerContributionEmployeeTypeAxis=cnp_EBPParticipantBargainingRetirementPlanParticipantIncludingUtilityWorkersUnionOfAmericaLocal175Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	cnp_EBPEmployerContributionEmployeeTypeAxis=cnp_NonUnionAndCertainUnionParticipantsHiredAfterJanuary12024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Description of the Plan (Details) - EBP 015 - USD ($)	12 Months Ended
Description of the Plan (Details) - EBP 015 - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Jun. 09, 2024
EBP, Description of Plan [Line Items]
Maximum annual participant pre-tax contribution rate, as percentage of compensation (percent)	50.00%
Maximum annual participant Roth and / or after-tax contribution rate, as percentage of compensation (percent)	16.00%
Period after receipt of of automatic enrollment notice that employee can opt out or change their contribution percentage	30 days
Annual increase in participant automatic deferral rate (percent)	1.00%
Company's match (percent)	100.00%
Eligible compensation contributed by Participant that is matched (percent)	6.00%
Employer non-matching discretionary contribution (percent)	3.00%
Maximum participant contributions to be directed for investment in employer's common stock fund (percent)	25.00%
Maximum participant investment in employer's common stock fund (percent)	25.00%
Participants' contribution, investment direction, incremental rate (percent)	1.00%
Minimum required investment in the self-directed brokerage account option	$ 1,000
Forfeited non-vested accounts used to reduce future employer contributions and / or pay administrative expenses of the Plan	441,000	$ 84,000
Participant loan limit	$ 50,000
Participant loan limit as a percentage of vested account balance (percent)	50.00%
Minimum loan amount	$ 500
Loan repayment period (up to)	5 years
Loan origination fee (percent)	$ 50
Loan interest rate, spread on prime rate (percent)	1.00%
Required minimum distribution threshold	$ 7,000		$ 5,000
Account balance threshold to be eligible for direct roll-over into another retirement account	$ 1,000
Service period threshold less than which would result in suspension of making after-tax contributions	5 years
Minimum
EBP, Description of Plan [Line Items]
Participant automatic deferral rate (percent)	6.00%
Future contributions that can be directly invested in the self-brokerage account (percent)	10.00%
Maximum
EBP, Description of Plan [Line Items]
Participant automatic deferral rate (percent)	10.00%
Future contributions that can be directly invested in the self-brokerage account (percent)	90.00%
Grandfathered Non-Bargaining Retirement Plan Participant
EBP, Description of Plan [Line Items]
Company's match (percent)	50.00%
Eligible compensation contributed by Participant that is matched (percent)	6.00%
Bargaining Retirement Plan Participants
EBP, Description of Plan [Line Items]
Period after receipt of of automatic enrollment notice that employee can opt out or change their contribution percentage	90 days
Eligible compensation contributed by Participant that is matched (percent)	6.00%
Participants' annual vesting in employer contributions (percent)	20.00%
Participant vesting period in employer contributions	5 years
Bargaining Retirement Plan Participants \| Minimum
EBP, Description of Plan [Line Items]
Participant automatic deferral rate (percent)	3.00%
Eligible compensation contributed by Participant that is matched (percent)	5.00%
Bargaining Retirement Plan Participants \| Maximum
EBP, Description of Plan [Line Items]
Company's match (percent)	50.00%
Eligible compensation contributed by Participant that is matched (percent)	8.00%
EBP, Participant, Bargaining Retirement Plan Participant, Including Utility Workers Union of America, Local 175
EBP, Description of Plan [Line Items]
Maximum annual eligible compensation contributed by Participant that is matched	$ 1,400
Non-Union And Certain Union Participants Hired After January 1, 2024
EBP, Description of Plan [Line Items]
Participant vesting period in employer contributions	2 years