Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 15,579	$ 23,549
Non-current	110,504	109,415
Total restricted cash and cash equivalents	126,083	132,964
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	15,579	23,549
Non-current	110,481	109,392
Total restricted cash and cash equivalents	126,060	132,941
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,523	9,409
Non-current	6,129	6,086
Cleco Power’s storm restoration costs - Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,523	9,409
Non-current	6,129	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	6,056	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	6,056	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	104,352	103,306
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 104,352	$ 103,306