Summary of Significant Accounting Policies - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 7,684	$ 15,818
Non-current	114,977	113,573
Total restricted cash and cash equivalents	122,661	129,391
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	7,684	15,818
Non-current	114,953	113,549
Total restricted cash and cash equivalents	122,637	129,367
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs and debt service
Restricted Cash and Cash Equivalents Items [Line Items]
Current	7,684	15,818
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	7,684	15,818
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	114,953	113,549
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	$ 114,953	$ 113,549