Fair Value Accounting Instruments - Schedule of Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) - Measured on a Recurring Basis - FTRs $ in Thousands	Mar. 31, 2024 USD ($) $ / MW	Dec. 31, 2023 USD ($) $ / MW
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 881	$ 3,087
LIABILITIES	435	781
CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	881	3,087
LIABILITIES	435	781
Level 3
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	881	3,087
LIABILITIES	$ 435	$ 781
Level 3 | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(1.98)	(3.51)
Level 3 | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	7.34	7.07
Level 3 | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 881	$ 3,087
LIABILITIES	$ 435	$ 781
Level 3 | CLECO POWER | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(1.98)	(3.51)
Level 3 | CLECO POWER | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	7.34	7.07