Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Litigation (Details) $ in Millions	1 Months Ended			24 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2014 claim	Nov. 30, 2014 claim	Dec. 31, 2019 USD ($)	Mar. 31, 2022 USD ($)	Mar. 29, 2021 USD ($)	Feb. 29, 2020 USD ($)
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss					$ 6.7
South Central Generating
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss					1.5
Gulf Coast Spinning start up costs
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform	$ 6.5
Gulf Coast Spinning construction of cotton spinning facility
Loss Contingencies [Line Items]
Allegations by plaintiff, failure to perform	$ 60.0
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 | Deferred storm restoration costs - Winter Storms Uri & Viola
Loss Contingencies [Line Items]
Capitalized storm restoration costs					$ 8.1	$ 50.0
CLECO POWER | LPSC 2018-2019 Fuel Audit
Loss Contingencies [Line Items]
Fuel expense				$ 565.8
Gulf Coast Spinning Company, LLC | Gulf Coast Spinning construction of cotton spinning facility | Diversified Lands LLC
Loss Contingencies [Line Items]
Loans payable							$ 2.0