Fair Value Accounting Instruments - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) - Measured On A Recurring Basis - FTRs $ in Thousands	Dec. 31, 2024 USD ($) $ / MW	Dec. 31, 2023 USD ($) $ / MW
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 2,084	$ 3,087
LIABILITIES	256	781
CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	2,084	3,087
LIABILITIES	256	781
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	2,084	3,087
LIABILITIES	$ 256	$ 781
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	(4.39)	(3.51)
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	8.49	7.07
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	0.27	0.24
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 2,084	$ 3,087
LIABILITIES	$ 256	$ 781
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	(4.39)	(3.51)
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	8.49	7.07
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	0.27	0.24