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	Sep. 30, 2023 USD ($) $ / MW	Dec. 31, 2022 USD ($) $ / MW
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 4,814	$ 2,570
LIABILITIES	671	294
CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	4,814	2,570
LIABILITIES	671	294
Level 3
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	4,814	2,570
LIABILITIES	$ 671	$ 294
Level 3 | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(5.11)	(5.11)
Level 3 | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	7.02	13.65
Level 3 | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 4,814	$ 2,570
LIABILITIES	$ 671	$ 294
Level 3 | CLECO POWER | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(5.11)	(5.11)
Level 3 | CLECO POWER | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
FORWARD PRICE RANGE (usd per mwh) | $ / MW	7.02	13.65