Variable Interest Entities - Schedule of Cleco Securitization I Financial Statement Impact (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	$ 17,303		$ 15,918
Total assets	7,512,870		7,369,606
Long-term debt and finance leases due within one year	143,543		264,934
Interest accrued	37,371		19,919
Long-term debt, net	2,932,113		2,645,043
Total liabilities	4,631,926		4,528,592
Member’s equity	2,880,944	$ 2,815,643	2,841,014	$ 2,873,173
Total liabilities and member’s equity	7,512,870		7,369,606
Income Statement Related Disclosures [Abstract]
Operating revenue	295,244	276,842
Operating expenses	(216,267)	(291,219)
Interest income	7,133	1,408
Interest charges, net	(37,178)	(42,792)
Net income	49,369	(51,522)
Storm Recover Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	381,569		384,908
Energy Transition Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	299,735		0
Related Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	35,484		35,459
Accounts payable - affiliate	21,368		21,368
Nonrelated Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	43,397		47,520
Accounts payable - affiliate	112,982		125,483
VIE, Primary Beneficiary - Cleco Securitization I
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	7,187		15,918
Long-term debt and finance leases due within one year	15,390		15,087
Interest accrued	1,472		5,997
Long-term debt, net	372,178		380,468
Member’s equity	2,133		2,157
Total liabilities and member’s equity	391,262		405,509
Income Statement Related Disclosures [Abstract]
Operating revenue	7,937	8,036
Operating expenses	(3,477)	(3,466)
Interest income	184	228
Interest charges, net	(4,619)	(4,773)
Net income	25	25
VIE, Primary Beneficiary - Cleco Securitization I | Storm Recover Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	381,569		384,908
Total assets	391,262		405,509
Total liabilities	389,129		403,352
VIE, Primary Beneficiary - Cleco Securitization I | Related Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	2,506		4,683
Accounts payable - affiliate	69		1,800
VIE, Primary Beneficiary - Cleco Securitization I | Nonrelated Party
Balance Sheet Related Disclosures [Abstract]
Accounts payable - affiliate	20		0
Variable Interest Entity, Primary Beneficiary, Cleco Securitization II
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	2,540
Long-term debt and finance leases due within one year	3,214
Accounts payable - affiliate	19
Interest accrued	825
Long-term debt, net	296,794
Member’s equity	1,423
Total liabilities and member’s equity	302,275
Income Statement Related Disclosures [Abstract]
Operating revenue	(18)
Interest charges, net	(847)
Net income	(865)
Variable Interest Entity, Primary Beneficiary, Cleco Securitization II | Energy Transition Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	299,735
Total assets	302,275
Total liabilities	300,852
CLECO POWER
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	17,303		15,918
Total assets	5,539,608		5,388,769
Long-term debt and finance leases due within one year	143,543		264,934
Interest accrued	23,985		11,781
Long-term debt, net	1,835,384		1,546,624
Member’s equity	2,156,643	2,016,843	2,107,407	$ 2,063,237
Total liabilities and member’s equity	5,539,608		5,388,769
Income Statement Related Disclosures [Abstract]
Operating revenue	293,829	288,034
Operating expenses	(212,018)	(274,029)
Interest income	4,592	1,288
Interest charges, net	(26,441)	(25,514)
Net income	60,900	(7,608)
CLECO POWER | Storm Recover Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	381,569		384,908
CLECO POWER | Energy Transition Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	299,735		0
CLECO POWER | Related Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	1,195		1,174
Accounts payable - affiliate	10,369		11,389
CLECO POWER | Nonrelated Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	43,397		47,520
Accounts payable - affiliate	105,609		110,361
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	7,187		15,918
Long-term debt and finance leases due within one year	15,390		15,087
Interest accrued	1,472		5,997
Long-term debt, net	372,178		380,468
Member’s equity	2,133		2,157
Total liabilities and member’s equity	391,262		405,509
Income Statement Related Disclosures [Abstract]
Operating revenue	7,937	8,036
Operating expenses	(3,477)	(3,466)
Interest income	184	228
Interest charges, net	(4,619)	(4,773)
Net income	25	$ 25
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I | Storm Recover Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	381,569		384,908
Total assets	391,262		405,509
Total liabilities	389,129		403,352
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I | Related Party
Balance Sheet Related Disclosures [Abstract]
Accounts receivable - affiliate	2,506		4,683
Accounts payable - affiliate	69		1,800
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I | Nonrelated Party
Balance Sheet Related Disclosures [Abstract]
Accounts payable - affiliate	20		$ 0
CLECO POWER | Variable Interest Entity, Primary Beneficiary, Cleco Securitization II
Balance Sheet Related Disclosures [Abstract]
Restricted cash - current	2,540
Long-term debt and finance leases due within one year	3,214
Accounts payable - affiliate	19
Interest accrued	825
Long-term debt, net	296,794
Member’s equity	1,423
Total liabilities and member’s equity	302,275
Income Statement Related Disclosures [Abstract]
Operating revenue	(18)
Interest charges, net	(847)
Net income	(865)
CLECO POWER | Variable Interest Entity, Primary Beneficiary, Cleco Securitization II | Energy Transition Property
Balance Sheet Related Disclosures [Abstract]
Intangible asset - securitization	299,735
Total assets	302,275
Total liabilities	$ 300,852