Annual Billing Credit Settlement

No definition available.

Name:	cnl_AnnualBillingCreditSettlement
Namespace Prefix:	cnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Billing Credit Settlement

+ References

No definition available.

+ Details

Name:	cnl_BillingCreditSettlement
Namespace Prefix:	cnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Adjustment Provided To Residential Customer Per Year

+ References

No definition available.

+ Details

Name:	cnl_PublicUtilitiesAdjustmentProvidedToResidentialCustomerPerYear
Namespace Prefix:	cnl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Public Utilities, Adjustment Provided To Residential Customer, Period

+ References

No definition available.

+ Details

Name:	cnl_PublicUtilitiesAdjustmentProvidedToResidentialCustomerPeriod
Namespace Prefix:	cnl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The high range of the return on equity which triggers a retail customer partial refund obligation. All retail earnings must be returned to customers when the return on equity exceeds this high range.

+ References

No definition available.

+ Details

Name:	cnl_PublicUtilitiesReturnOnEquityForCustomerRefundHighRange
Namespace Prefix:	cnl_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The low range of the return on equity which triggers a retail customer partial refund obligation.

+ References

No definition available.

+ Details

Name:	cnl_PublicUtilitiesReturnOnEquityForCustomerRefundLowRange
Namespace Prefix:	cnl_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of retail earnings to be returned to retail customers as ordered by the regulatory agency when the return on equity falls within a certain range.

+ References

No definition available.

+ Details

Name:	cnl_PublicUtilitiesReturnOnEquityPercentageOfRetailEarningsDueToCustomersWithinRange
Namespace Prefix:	cnl_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of deferred cost, excluding capitalized cost related to contract with customer; classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

Name:	us-gaap_DeferredCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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

No definition available.

+ Details

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

- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 405
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477571/980-405-25-1

+ Details

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

- Definition

The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period.

+ References

+ Details

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

- Details

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

- Details

Name:	us-gaap_PublicUtilitiesRegulatoryProceedingAxis=cnl_FRPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=cnl_LouisianaPublicServiceCommissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=cnl_DoletHillsMember
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:	us-gaap_RegulatoryLiabilityAxis=cnl_ExcessADITMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Regulation and Rates (Details) - USD ($) $ in Thousands					3 Months Ended
Regulation and Rates (Details) - USD ($) $ in Thousands	Jul. 01, 2025	Jul. 01, 2024	Apr. 19, 2024	Feb. 02, 2024	Sep. 30, 2024	Jun. 30, 2025	Dec. 31, 2024
Regulation and Rates [Line Items]
Current regulatory liabilities						$ 9,595	$ 8,327
CLECO POWER
Regulation and Rates [Line Items]
Regulatory liabilities						117,070	86,005
Current regulatory liabilities						9,595	8,327
CLECO POWER \| FRP
Regulation and Rates [Line Items]
Public utilities, adjustment provided to residential customer per year		$ 3,000
CLECO POWER \| FRP \| Subsequent event
Regulation and Rates [Line Items]
Public utilities, adjustment provided to residential customer per year	$ 3,000
Public utilities, return on equity, residential customer period	12 months
CLECO POWER \| LPSC
Regulation and Rates [Line Items]
Deferred costs						200	$ 4,000
CLECO POWER \| LPSC \| Dolet Hills
Regulation and Rates [Line Items]
Annual billing credit settlement			$ 20,000		$ 20,000
Billing credit settlement			$ 60,000	$ 60,000
CLECO POWER \| LPSC \| FRP
Regulation and Rates [Line Items]
Target ROE allowed by FRP		9.70%
Percentage of retail earnings within range to be returned to customers		60.00%
ROE for customer credit, low range		10.30%
ROE for customer credit, high range		10.90%
CLECO POWER \| LPSC \| FRP \| Maximum
Regulation and Rates [Line Items]
Target ROE allowed by FRP		10.30%
CLECO POWER \| Excess ADIT \| LPSC
Regulation and Rates [Line Items]
Regulatory liabilities						186,100
Current regulatory liabilities						$ 6,400