Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 14,902	$ 1,674
Non-current	109,373	745
Total restricted cash and cash equivalents	124,275	2,419
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	14,902	1,674
Non-current	108,623	0
Total restricted cash and cash equivalents	123,525	1,674
Cleco Katrina/Rita storm recovery surcharge
Restricted Cash and Cash Equivalents Items [Line Items]
Current	0	1,674
Cleco Katrina/Rita storm recovery surcharge | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	0	1,674
Customer refund payments	1,600
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,350	0
Non-current	6,037	0
Cleco Power’s storm restoration costs - Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,350	0
Non-current	6,037	0
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service
Restricted Cash and Cash Equivalents Items [Line Items]
Current	5,552	0
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	5,552	0
Diversified Lands’ mitigation escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	22	22
Cleco Cajun’s defense fund
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	728	723
Future storm restoration costs
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	102,586	0
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 102,586	$ 0