Derivative Instruments - Schedule of Derivative Instruments as Recorded in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
FTRs
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Energy risk management assets	Energy risk management assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
FTRs | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Energy risk management assets	Energy risk management assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
Natural gas derivatives
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
Natural gas derivatives | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
Not Designated as Hedging Instrument
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset (liability), net	$ (7,614)	$ (7,657)
Not Designated as Hedging Instrument | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset (liability), net	(7,672)	(12,025)
Not Designated as Hedging Instrument | FTRs
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	881	3,087
Derivative liability	(435)	(781)
Not Designated as Hedging Instrument | FTRs | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	881	3,087
Derivative liability	(435)	(781)
Not Designated as Hedging Instrument | Natural gas derivatives
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative liability	(12,608)	(15,005)
Not Designated as Hedging Instrument | Natural gas derivatives | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative liability	(12,570)	(14,331)
Not Designated as Hedging Instrument | Natural gas derivatives | Energy risk management assets, current
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	4,548	5,042
Not Designated as Hedging Instrument | Natural gas derivatives | Energy risk management assets, current | CLECO POWER
Price Risk Derivatives, at Fair Value, Net [Abstract]
Derivative asset	$ 4,452	$ 0