Summary of Significant Accounting Policies - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	$ 17,303	$ 15,918
Non-current	150,938	116,493
Total restricted cash and cash equivalents	168,241	132,411
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	17,303	15,918
Non-current	150,914	116,469
Total restricted cash and cash equivalents	168,217	132,387
Cleco Securitization I and Cleco Securitization II operating expenses and debt service
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	9,727	15,918
Cleco Securitization I and Cleco Securitization II operating expenses and debt service | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	9,727	15,918
Cleco Securitization II Dolet Hills plant and mine retirement costs
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	7,576	0
Non-current	33,255	1
Cleco Securitization II Dolet Hills plant and mine retirement costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash - current	7,576	0
Non-current	33,255	1
Diversified Lands’ mitigation escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	24	24
Future storm restoration costs
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	117,659	116,468
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 117,659	$ 116,468