Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 22,671	$ 23,549
Non-current	111,109	109,415
Total restricted cash and cash equivalents	133,780	132,964
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	22,671	23,549
Non-current	111,086	109,392
Total restricted cash and cash equivalents	133,757	132,941
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,639	9,409
Non-current	6,200	6,086
Cleco Power’s storm restoration costs - Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,639	9,409
Non-current	6,200	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	13,032	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	13,032	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	104,886	103,306
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 104,886	$ 103,306