Derivative Instruments - Schedule of Derivative Instruments as Recorded in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
FTRs
GROSS ASSET (LIABILITY)
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
GROSS ASSET (LIABILITY)
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
GROSS ASSET (LIABILITY)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
Natural gas derivatives | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Energy risk management liabilities	Energy risk management liabilities
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS
GROSS ASSET (LIABILITY)
Derivative asset (liability), net	$ 11,038	$ (7,657)
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative asset (liability), net	11,038	(12,025)
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS | FTRs
GROSS ASSET (LIABILITY)
Derivative asset	2,084	3,087
Derivative liability	(256)	(781)
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS | FTRs | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative asset	2,084	3,087
Derivative liability	(256)	(781)
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS | Natural gas derivatives
GROSS ASSET (LIABILITY)
Derivative asset	9,210	5,042
Derivative liability	0	(15,005)
DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS | Natural gas derivatives | CLECO POWER
GROSS ASSET (LIABILITY)
Derivative asset	9,210	0
Derivative liability	$ 0	$ (14,331)