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, 2025 USD ($) $ / MW	Dec. 31, 2024 USD ($) $ / MW
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 588	$ 2,084
LIABILITIES	138	256
CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	588	2,084
LIABILITIES	138	256
Level 3
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	588	2,084
LIABILITIES	$ 138	$ 256
Level 3 | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	(1.98)	(4.39)
Level 3 | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	10.32	8.49
Level 3 | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	0.18	0.27
Level 3 | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 588	$ 2,084
LIABILITIES	$ 138	$ 256
Level 3 | CLECO POWER | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	(1.98)	(4.39)
Level 3 | CLECO POWER | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	10.32	8.49
Level 3 | CLECO POWER | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
INPUT/RANGE PRICE (usd per mwh) | $ / MW	0.18	0.27