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

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Fair value of the amount outstanding under the credit facility.

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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.

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

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Indebtedness divided by net capital.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt - Narrative (Details)				12 Months Ended
Debt - Narrative (Details)	Dec. 16, 2024 USD ($)	May 17, 2024 USD ($)	Apr. 26, 2024 USD ($)	Dec. 31, 2024 USD ($) creditFacility	Nov. 27, 2024 USD ($)	Sep. 20, 2024 USD ($)	Jun. 04, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Long-term debt due within one year				$ 264,934,000				$ 256,811,000
Long-term debt and lease obligation, increase (decrease)				$ 8,100,000
Aggregate principal amount							$ 165,000,000
Maximum
Debt Instrument [Line Items]
Debt to capital ratio				0.65
NRG South Central
Debt Instrument [Line Items]
Repayments of long-term debt				$ 400,000,000.0
Line of Credit
Debt Instrument [Line Items]
Borrowings outstanding				10,000,000
Maximum borrowing capacity				$ 175,000,000
Number of revolving credit facilities \| creditFacility				2
Line of credit facility, remaining borrowing capacity				$ 475,000,000
Uncommitted lines of credit, expired						$ 10,000,000
Short-term borrowings expired						10,000,000
Maximum amount of uncommitted lines of credit expired						10,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fees				0.275%
Interest rate, potential additional interest				0.125%
Commitment fee, potential additional fee				0.05%
Line of Credit \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate				1.725%
Line of Credit \| Revolving Credit Facility \| ABR
Debt Instrument [Line Items]
Basis spread on variable rate				0.625%
Senior Notes Due November 2025 \| Line of Credit
Debt Instrument [Line Items]
Repayments of long-term debt				$ 50,000,000
Term Loan Agreement
Debt Instrument [Line Items]
Repayments of long-term debt			$ 66,700,000	66,700,000
Senior notes, 3.17%, due 2024
Debt Instrument [Line Items]
Repayments of long-term debt	$ 50,000,000
Interest rate	3.17%
Cleco Power's Senior Notes, 3.743%, Due 2026
Debt Instrument [Line Items]
Interest rate					3.743%
Cleco Power's Senior Notes, 3.743%, Due 2026 \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 175,000,000
Cleco Power
Debt Instrument [Line Items]
Long-term debt due within one year				264,934,000				$ 190,314,000
Long-term debt and lease obligation, increase (decrease)				$ 74,600,000
Cleco Power \| Maximum
Debt Instrument [Line Items]
Debt to capital ratio				0.65
Cleco Power \| Line of Credit
Debt Instrument [Line Items]
Borrowings outstanding				$ 110,000,000
Maximum borrowing capacity				$ 300,000,000
Number of revolving credit facilities \| creditFacility				1
Uncommitted lines of credit, expired						$ 10,000,000
Cleco Power \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 300,000,000
Commitment fees				0.15%
Interest rate, potential additional interest				0.125%
Commitment fee, potential additional fee				0.025%
Cleco Power \| Line of Credit \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate				1.35%
Cleco Power \| Line of Credit \| Revolving Credit Facility \| ABR
Debt Instrument [Line Items]
Basis spread on variable rate				0.25%
Cleco Power \| Senior Notes Due November 2025
Debt Instrument [Line Items]
Long-term debt and lease obligation, increase (decrease)				$ 75,000,000
Cleco Power \| Go-Zone Bonds
Debt Instrument [Line Items]
Long-term debt and lease obligation, increase (decrease)				$ 50,000,000
Cleco Power \| Term Loan Agreement \| Line of Credit \| Revolving Credit Facility \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate				1.35%
Cleco Power \| Term Loan Agreement \| Line of Credit \| Revolving Credit Facility \| ABR
Debt Instrument [Line Items]
Basis spread on variable rate				0.25%
Cleco Power \| Senior notes, 3.17%, due 2024
Debt Instrument [Line Items]
Long-term debt and lease obligation, increase (decrease)		$ 125,000,000
Interest rate				3.17%
Cleco Holdings \| Line of Credit
Debt Instrument [Line Items]
Number of revolving credit facilities \| creditFacility				1