Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees (Details) - USD ($)		1 Months Ended		3 Months Ended	6 Months Ended
	Apr. 19, 2024	Jan. 31, 2023	Sep. 30, 2015	Mar. 31, 2024	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2023	Feb. 29, 2020
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss				$ 7,700,000
Guarantor obligations, collateral held directly or by third parties, amount				0
Performance Guarantee
Loss Contingencies [Line Items]
Maximum of potential payments				42,400,000
Indemnification Agreement
Loss Contingencies [Line Items]
Maximum of potential payments				40,000,000
Indemnification Agreement including fundamental organizational structure
Loss Contingencies [Line Items]
Maximum of potential payments				400,000,000
LPSC | Dolet Hills
Loss Contingencies [Line Items]
Increase (decrease) in regulatory assets				(40,000,000)
Depreciation				40,000,000
Provision for rate refund and electric customer credits				1,300,000
CLECO POWER
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss				7,000,000
Guarantor obligations, collateral held directly or by third parties, amount				0
CLECO POWER | Indemnification Agreement
Loss Contingencies [Line Items]
Maximum of potential payments				40,000,000
CLECO POWER | Indemnification Agreement including fundamental organizational structure
Loss Contingencies [Line Items]
Maximum of potential payments				400,000,000
CLECO POWER | LPSC
Loss Contingencies [Line Items]
Recovery of from energy efficiency programs					$ 8,500,000	$ 6,800,000
CLECO POWER | LPSC | Dolet Hills
Loss Contingencies [Line Items]
Reserve for litigation matters							$ 58,700,000
Increase (decrease) in regulatory assets				(40,000,000)
Depreciation				40,000,000
Provision for rate refund and electric customer credits				1,300,000
CLECO POWER | LPSC | Dolet Hills | Subsequent event
Loss Contingencies [Line Items]
Increase (decrease) in regulatory assets	$ (40,000,000)
Annual billing credit settlement	20,000,000
Billing credit settlement	60,000,000
Securitization amount	$ 305,000,000
CLECO POWER | LPSC 2020-2022 Fuel Audit
Loss Contingencies [Line Items]
Fuel expense		$ 1,100,000,000
CLECO CAJUN
Loss Contingencies [Line Items]
Indemnification assets, maximum environmental costs				25,000,000
Indemnification assets				$ 18,600,000
Gulf Coast Spinning start up costs
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform			$ 6,500,000
Gulf Coast Spinning construction of cotton spinning facility
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform			$ 60,000,000
Gulf Coast Spinning construction of cotton spinning facility | Gulf Coast Spinning Company, LLC | Diversified Lands LLC
Loss Contingencies [Line Items]
Loans payable								$ 2,000,000