Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents [Abstract]
Current		$ 23,549	$ 1,674
Restricted cash - noncurrent		110,148	745
Total restricted cash and cash equivalents		133,697	2,419
Cleco Katrina/Rita’s storm recovery surcharge
Restricted Cash and Cash Equivalents [Abstract]
Current		0	1,674
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents [Abstract]
Current		9,409	0
Restricted cash - noncurrent		6,086	0
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service
Restricted Cash and Cash Equivalents [Abstract]
Current		14,140	0
Diversified Lands’ mitigation escrow
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash - noncurrent		23	22
Cleco Cajun’s defense fund
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash - noncurrent		733	723
Future storm restoration costs
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash - noncurrent		103,306	0
CLECO POWER
Restricted Cash and Cash Equivalents [Abstract]
Current		23,549	1,674
Restricted cash - noncurrent		109,392	0
Total restricted cash and cash equivalents		132,941	1,674
CLECO POWER | Cleco Katrina/Rita’s storm recovery surcharge
Restricted Cash and Cash Equivalents [Abstract]
Current		0	1,674
Customer refund payments	$ 1,600
CLECO POWER | Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents [Abstract]
Current		9,409	0
Restricted cash - noncurrent		6,086	0
CLECO POWER | Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service
Restricted Cash and Cash Equivalents [Abstract]
Current		14,140	0
CLECO POWER | Future storm restoration costs
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash - noncurrent		$ 103,306	$ 0