Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Litigation (Details) $ in Thousands			1 Months Ended				3 Months Ended		9 Months Ended		24 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 21, 2022 USD ($)	Oct. 31, 2022 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 claim	Nov. 30, 2014 claim	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2019 USD ($)	Oct. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 29, 2021 USD ($)	Feb. 29, 2020 USD ($)	Jul. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Provision for rate refund	$ 13,256						$ 13,256		$ 13,256				$ 5,682
Electric customer credits							6,728	$ 691	6,992	$ 40,185
Loss contingency, estimate of possible loss	8,300						8,300		8,300
South Central Generating
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	1,500						1,500		1,500
Gulf Coast Spinning start up costs
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform				$ 6,500
Gulf Coast Spinning construction of cotton spinning facility
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform				$ 60,000
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
CLECO POWER
Loss Contingencies [Line Items]
Provision for rate refund	13,256						13,256		13,256				5,682			$ 79,200
Electric customer credits							6,728	$ 691	6,992	$ 40,429
Regulatory assets	675,386						675,386		675,386				759,165
CLECO POWER | St. Mary Clean Energy Center
Loss Contingencies [Line Items]
Regulatory assets	8,607						8,607		8,607				$ 6,089
CLECO POWER | St. Mary Clean Energy Center, refund liability
Loss Contingencies [Line Items]
Regulatory assets	3,800						3,800		3,800
CLECO POWER | St. Mary Clean Energy Center, refund liability | Subsequent event
Loss Contingencies [Line Items]
Regulatory assets												$ 3,800
CLECO POWER | Deferred storm restoration costs - Winter Storms Uri & Viola
Loss Contingencies [Line Items]
Capitalized storm restoration costs														$ 50,000
CLECO POWER | LPSC 2018-2019 Fuel Audit
Loss Contingencies [Line Items]
Fuel expense											$ 565,800
CLECO POWER | LPSC
Loss Contingencies [Line Items]
Electric customer credits	6,600	$ 6,600
CLECO POWER | LPSC | St. Mary Clean Energy Center
Loss Contingencies [Line Items]
Disallowed recovery costs		15,000
Impairment of regulatory asset		13,800
Provision for rate refund	10,400	10,400					10,400		10,400
CLECO POWER | LPSC | St. Mary Clean Energy Center | Subsequent event
Loss Contingencies [Line Items]
Customer refund payments, bill credits			$ 10,400
CLECO POWER | LPSC | St. Mary Clean Energy Center, refund liability
Loss Contingencies [Line Items]
Regulatory assets	$ 3,800	$ 3,800					$ 3,800		$ 3,800
Gulf Coast Spinning Company, LLC | Gulf Coast Spinning construction of cotton spinning facility | Diversified Lands LLC
Loss Contingencies [Line Items]
Loans payable															$ 2,000