Summary of Significant Accounting Policies - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 6,356	$ 23,549
Non-current	112,018	109,415
Total restricted cash and cash equivalents	118,374	132,964
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	6,356	23,549
Non-current	111,995	109,392
Total restricted cash and cash equivalents	118,351	132,941
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents Items [Line Items]
Current	0	9,409
Non-current	0	6,086
Cleco Power’s storm restoration costs - Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	0	9,409
Non-current	0	6,086
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service
Restricted Cash and Cash Equivalents Items [Line Items]
Current	6,356	14,140
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	6,356	14,140
Diversified Lands’ mitigation escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	23	23
Future storm restoration costs
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	111,995	103,306
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 111,995	$ 103,306