Derivative Instruments - Amount of Gain (Loss) Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($) derivative
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	$ (6,277)	$ 345
CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(6,277)	345
Price risk derivatives | Accumulated deferred fuel
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses associated with derivatives	100	300
Price risk derivatives | Accumulated deferred fuel | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses associated with derivatives	100	300
Price risk derivatives | Electric Operations [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	859	1,583
Price risk derivatives | Electric Operations [Member] | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	859	1,583
Price risk derivatives | Power Purchased For Utility Customers [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(596)	(1,238)
Price risk derivatives | Power Purchased For Utility Customers [Member] | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(596)	(1,238)
Natural Gas Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(6,540)	$ 0
Number of derivatives held | derivative		0
Natural Gas Derivatives [Member] | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in income on derivatives	(6,540)	$ 0
Number of derivatives held | derivative		0
Natural Gas Derivatives [Member] | Accumulated deferred fuel
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses associated with derivatives	4,500
Realized losses associated with natural gas derivatives	1,800
Natural Gas Derivatives [Member] | Accumulated deferred fuel | CLECO POWER
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized losses associated with derivatives	4,500
Realized losses associated with natural gas derivatives	$ 1,800