Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees (Details)		1 Months Ended						9 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Apr. 30, 2023 USD ($)	Jan. 31, 2023 USD ($)	Aug. 31, 2022 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 claim	Nov. 30, 2014 claim	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Feb. 29, 2020 USD ($)
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss								$ 8,100,000
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
CLECO POWER
Loss Contingencies [Line Items]
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]
Potentially unrecoverable power state retirement costs				$ 217,000,000
CLECO POWER | Deferred storm restoration costs - Winter Storms Uri & Viola
Loss Contingencies [Line Items]
Capitalized storm restoration costs											$ 50,000,000
CLECO POWER | LPSC 2020-2022 Fuel Audit
Loss Contingencies [Line Items]
Fuel expense			$ 1,100,000,000
CLECO POWER | LPSC 2020-2022 Environmental Audit
Loss Contingencies [Line Items]
Fuel expense		$ 38,300,000
CLECO CAJUN
Loss Contingencies [Line Items]
Decrease in ARO balance	$ 19,500,000
Indemnification assets, maximum environmental costs								25,000,000
Indemnification assets								$ 18,000,000
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
Actions filed in the 9th Judicial District Court | Alleged Breach of Fiduciary Duties
Loss Contingencies [Line Items]
Number of actions filed | claim							4
Actions filed in the Civil District Court | Alleged Breach of Fiduciary Duties
Loss Contingencies [Line Items]
Number of actions filed | claim						3	3