Schedule I Financial Statements of Cleco Holdings (Parent Company Only) - Debt (Details)				12 Months Ended
	May 21, 2024 USD ($)	May 17, 2024 USD ($)	Apr. 26, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 27, 2024 USD ($)	Sep. 20, 2024 USD ($)	Jun. 04, 2024 USD ($)
Condensed Financial Statements, Captions [Line Items]
Short-term debt				$ 120,000,000	$ 110,000,000
Aggregate principal amount									$ 165,000,000
NRG South Central
Condensed Financial Statements, Captions [Line Items]
Repayments of long-term debt				$ 400,000,000.0
Maximum
Condensed Financial Statements, Captions [Line Items]
Debt to capital ratio				0.65
Term Loan Agreement
Condensed Financial Statements, Captions [Line Items]
Repayments of long-term debt			$ 66,700,000	$ 66,700,000
Cleco Power's Senior Notes, 3.743%, Due 2026
Condensed Financial Statements, Captions [Line Items]
Interest rate							3.743%
Line of Credit
Condensed Financial Statements, Captions [Line Items]
Borrowings outstanding				10,000,000
Maximum borrowing capacity				$ 175,000,000
Revolving Credit Facility | Line of Credit
Condensed Financial Statements, Captions [Line Items]
Commitment fees				0.275%
Interest rate, potential additional interest				0.125%
Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate (SOFR)
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate				1.725%
Revolving Credit Facility | Line of Credit | ABR
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate				0.625%
Revolving Credit Facility | Line of Credit | Cleco Power's Senior Notes, 3.743%, Due 2026
Condensed Financial Statements, Captions [Line Items]
Maximum borrowing capacity							$ 175,000,000
Parent Company
Condensed Financial Statements, Captions [Line Items]
Short-term debt				$ 10,000,000	110,000,000
Long-term debt outstanding				1,000,000,000.00
Repayments of long-term debt				406,700,000	$ 65,600,000	$ 67,700,000
Aggregate principal amount									$ 165,000,000
For the year ending Dec. 31,
2025				0
2026				360,000,000
2027				0
2028				0
2029				300,000,000
Thereafter				350,000,000
Parent Company | NRG South Central
Condensed Financial Statements, Captions [Line Items]
Repayments of long-term debt				400,000,000
Parent Company | Term Loan Agreement
Condensed Financial Statements, Captions [Line Items]
Repayments of long-term debt	$ 66,700,000
Parent Company | Cleco Power's Senior Notes, 3.743%, Due 2026
Condensed Financial Statements, Captions [Line Items]
Interest rate							3.743%
Parent Company | Line of Credit
Condensed Financial Statements, Captions [Line Items]
Borrowings outstanding				$ 10,000,000.0
Outstanding borrowings								$ 10,000,000
Parent Company | Revolving Credit Facility | Maximum
Condensed Financial Statements, Captions [Line Items]
Debt to capital ratio		0.65
Parent Company | Revolving Credit Facility | Line of Credit
Condensed Financial Statements, Captions [Line Items]
Maximum borrowing capacity		$ 175,000,000
Commitment fees		0.275%
Interest rate, potential additional interest		0.05%
Parent Company | Revolving Credit Facility | Line of Credit | Secured Overnight Financing Rate (SOFR)
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate		1.725%
Parent Company | Revolving Credit Facility | Line of Credit | ABR
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate		0.625%
Parent Company | Revolving Credit Facility | Line of Credit | Cleco Power's Senior Notes, 3.743%, Due 2026
Condensed Financial Statements, Captions [Line Items]
Maximum borrowing capacity							$ 175,000,000