Fair Value Accounting Instruments - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) - FTRs - Fair Value, Recurring $ in Thousands	Dec. 31, 2025 USD ($) $ / MW	Dec. 31, 2024 USD ($) $ / MW
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 5,513	$ 2,084
LIABILITIES	945	256
CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	5,513	2,084
LIABILITIES	945	256
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	5,513	2,084
LIABILITIES	$ 945	$ 256
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	(6.78)	(4.39)
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	6.46	8.49
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	0.79	0.27
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
ASSETS	$ 5,513	$ 2,084
LIABILITIES	$ 945	$ 256
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Minimum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	(6.78)	(4.39)
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Maximum
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	6.46	8.49
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | CLECO POWER | Weighted Average
Price Risk Derivatives, at Fair Value, Net [Abstract]
Forward price range (usd per MWh) | $ / MW	0.79	0.27