Derivative Instruments - Schedule of Amount of Gain (Loss) Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instrument - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	$ (584,000)	$ (3,520,000)	$ (1,089,000)	$ (22,866,000)
CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(584,000)	(7,947,000)	(1,089,000)	(16,347,000)
FTRs | Accumulated deferred fuel
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses) associated with derivatives	100,000	(200,000)	100,000	(200,000)
FTRs | Electric operations
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	3,100,000	782,000	4,135,000	1,508,000
FTRs | Electric operations | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	3,100,000	782,000	4,135,000	1,508,000
FTRs | Purchased power
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(2,522,000)	(827,000)	(3,124,000)	(2,198,000)
FTRs | Purchased power | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(2,522,000)	(827,000)	(3,124,000)	(2,198,000)
Natural gas derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(1,162,000)	(3,475,000)	(2,100,000)	(22,176,000)
Natural gas derivatives | Accumulated deferred fuel
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives				10,100,000
Unrealized gains (losses) associated with derivatives	(12,100,000)	8,700,000	(4,700,000)
Realized gains (losses)	0	(1,500,000)	0	(1,500,000)
Natural gas derivatives | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	$ (1,162,000)	$ (7,902,000)	$ (2,100,000)	$ (15,657,000)