Variable Interest Entities - Summary of Cleco Securitization I Financial Statement Impact (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Current restricted cash and cash equivalents	$ 15,918	$ 15,818
Total assets	7,369,606	8,100,393	$ 8,253,749
Long-term debt due within one year	264,934	256,811
Interest accrued	19,919	22,209
Long-term debt, net	2,645,043	3,141,924
Total liabilities	4,528,592	5,227,220
Member’s equity	2,841,014	2,873,173	2,947,067	$ 2,954,156
Total liabilities and member’s equity	7,369,606	8,100,393
Income Statement Related Disclosures [Abstract]
Operating revenue	1,147,708	1,238,791	1,604,480
Operating expenses	(920,229)	(1,179,323)	(1,205,091)
Interest income	15,067	5,393	5,250
Interest charges, net	(156,718)	(165,529)	(145,773)
Income before taxes	78,957	(94,942)	253,183
Securitization
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	384,908	398,658
Affiliate
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	35,459	24,216
Accounts payable - affiliate	21,368	10,683
Cleco Power
Balance Sheet Related Disclosures [Abstract]
Current restricted cash and cash equivalents	15,918	15,818
Total assets	5,388,769	5,429,542
Long-term debt due within one year	264,934	190,314
Interest accrued	11,781	11,752
Long-term debt, net	1,546,624	1,697,152
Member’s equity	2,107,407	2,063,237	2,022,912	$ 1,948,537
Total liabilities and member’s equity	5,388,769	5,429,542
Income Statement Related Disclosures [Abstract]
Operating revenue	1,154,902	1,257,145	1,620,528
Operating expenses	(894,581)	(1,036,281)	(1,361,491)
Interest income	4,125	5,011	5,082
Interest charges, net	(102,021)	(99,552)	(90,035)
Income before taxes	157,424	132,715	172,560
Cleco Power | Securitization
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	384,908	398,658
Cleco Power | Affiliate
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	1,174	4,543
Accounts payable - affiliate	11,389	13,200
VIE, Primary Beneficiary - Cleco Securitization I
Balance Sheet Related Disclosures [Abstract]
Current restricted cash and cash equivalents	15,918	15,818
Total assets	405,509	417,968
Long-term debt due within one year	15,087	14,499
Interest accrued	5,997	6,191
Long-term debt, net	380,468	394,944
Total liabilities	403,352	415,810
Member’s equity	2,157	2,158
Total liabilities and member’s equity	405,509	417,968
Income Statement Related Disclosures [Abstract]
Operating revenue	32,447	33,913,000	13,181,000
Operating expenses	(14,183)	(14,884,000)	(2,992,000)
Interest income	667	537,000	63,000
Interest charges, net	(18,832)	(19,467,000)	(10,200,000)
Income before taxes	99	99,000	52,000
VIE, Primary Beneficiary - Cleco Securitization I | Securitization
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	384,908	398,658
VIE, Primary Beneficiary - Cleco Securitization I | Affiliate
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	4,683	3,492
Accounts payable - affiliate	1,800	176
VIE, Primary Beneficiary - Cleco Securitization I | Cleco Power
Balance Sheet Related Disclosures [Abstract]
Current restricted cash and cash equivalents	15,918	15,818
Total assets	405,509	417,968
Long-term debt due within one year	15,087	14,499
Interest accrued	5,997	6,191
Long-term debt, net	380,468	394,944
Total liabilities	403,352	415,810
Member’s equity	2,157	2,158
Total liabilities and member’s equity	405,509	417,968
Income Statement Related Disclosures [Abstract]
Operating revenue	32,447	33,913,000	13,181,000
Operating expenses	(14,183)	(14,884,000)	(2,992,000)
Interest income	667	537,000	63,000
Interest charges, net	(18,832)	(19,467,000)	(10,200,000)
Income before taxes	99	99,000	$ 52,000
VIE, Primary Beneficiary - Cleco Securitization I | Cleco Power | Securitization
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	384,908	398,658
VIE, Primary Beneficiary - Cleco Securitization I | Cleco Power | Affiliate
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	4,683	3,492
Accounts payable - affiliate	$ 1,800	$ 176