Segment Disclosures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Apr. 13, 2016 USD ($)
Revenue
Base revenue	$ 726,391	$ 683,412	$ 675,739
Fuel cost recovery revenue	321,980	504,503	837,647
Other operations	103,277	111,565	98,768
Affiliate revenue	0	0	0
Electric customer credits	(3,940)	(60,689)	(7,674)
Operating revenue, net	1,147,708	1,238,791	1,604,480
Regulatory disallowance	0	0	13,841
Depreciation and amortization	247,588	209,389	195,819
Interest income	15,067	5,393	5,250
Interest charges	153,555	164,856	143,956
Federal and state income tax expense (benefit)	14,056	(65,073)	20,035
Add (less): Other corporate costs and noncash items	23,568	144,418	(153,781)
EBITDA	488,601	418,328	433,927
Income from continuing operations, net of income taxes	64,901	(29,869)	233,148
Income from discontinued operations, net of income taxes	45,517	14,642	(44,337)
Net income (loss)	110,418	(15,227)	188,811
Additions to property, plant, and equipment	259,525	230,238	236,767
Equity Method Investments	1,916	1,992	2,072
Goodwill	1,490,797	1,490,797	1,490,797	$ 1,490,000
Total segment assets	7,369,606	8,100,393	8,253,749
Power supply agreement
Revenue
Amortization of intangible assets	2,881	9,454	9,680
Cleco Power
Revenue
Other operations	95,137	111,561	98,759
Affiliate revenue	12,452	8,904	6,377
Electric customer credits	(3,940)	(60,689)	(7,674)
Operating revenue, net	1,154,902	1,257,145	1,620,528
Regulatory disallowance	0	0	13,841
Interest income	4,125	5,011	5,082
Interest charges	98,858	98,879	88,218
Federal and state income tax expense (benefit)	18,506	(4,434)	2,503
Income from continuing operations, net of income taxes	138,918	137,149	170,057
Net income (loss)	138,918	137,149	170,057
Equity Method Investments	1,916	1,992
Total segment assets	5,388,769	5,429,542
Cleco Cajun | Natural gas derivatives
Revenue
Net gain (loss) recognized in income on derivatives	$ (6,500)	(116,800)	180,500
Cleco Power
Revenue
Number of reporting units | reporting_unit	1
Operating Segments | Cleco Power
Revenue
Base revenue	$ 729,273	692,866	685,419
Fuel cost recovery revenue	321,980	504,503	837,647
Other operations	95,137	111,561	98,759
Affiliate revenue	12,452	8,904	6,377
Electric customer credits	(3,940)	(60,689)	(7,674)
Operating revenue, net	1,154,902	1,257,145	1,620,528
Recoverable fuel and purchased power	321,980	504,512	837,647
Non recoverable fuel and purchased power	32,752	45,485	59,846
Other operations and maintenance	245,651	233,863	216,851
Taxes other than income taxes	57,754	60,676	55,075
Regulatory disallowance			13,841
Other segment items	8,164	(5,719)	3,341
Depreciation and amortization	236,444	191,745	178,231
Interest income	4,125	5,011	5,082
Interest charges	98,858	98,879	88,218
Federal and state income tax expense (benefit)	18,506	(4,434)	2,503
EBITDA	488,601	418,328	433,927
Administrative and general	95,300	83,500	63,700
Income from continuing operations, net of income taxes	138,918	137,149	170,057
Income from discontinued operations, net of income taxes	0	0	0
Net income (loss)	138,918	137,149	170,057
Additions to property, plant, and equipment	255,336	220,982	228,940
Equity Method Investments	1,916	1,992	2,072
Goodwill	1,490,797	1,490,797	1,490,797
Total segment assets	6,879,566	6,920,339	6,834,970
OTHER
Revenue
Base revenue	(2,881)	(9,454)	(9,680)
Fuel cost recovery revenue	0	0	0
Other operations	8,162	5	9
Affiliate revenue	108,127	120,716	109,015
Electric customer credits	0	0	0
Operating revenue, net	113,408	111,267	99,344
Depreciation and amortization	11,143	17,644	17,588
Interest income	11,291	571	265
Interest charges	55,046	66,165	55,834
Federal and state income tax expense (benefit)	(4,450)	(60,639)	17,532
Income from continuing operations, net of income taxes	(74,017)	(167,018)	63,093
Income from discontinued operations, net of income taxes	45,517	14,642	(44,337)
Net income (loss)	(28,500)	(152,376)	18,756
Additions to property, plant, and equipment	4,189	9,256	7,827
Equity Method Investments	(848,952)	(467,329)	(320,348)
Goodwill	0	0	0
Total segment assets	(286,556)	870,743	1,237,096
OTHER | Cleco Power | Power supply agreement
Revenue
Amortization of intangible assets	2,900	9,500	9,700
ELIMINATIONS
Revenue
Base revenue	(1)	0	0
Fuel cost recovery revenue	0	0	0
Other operations	(22)	(1)	0
Affiliate revenue	(120,579)	(129,620)	(115,392)
Electric customer credits	0	0	0
Operating revenue, net	(120,602)	(129,621)	(115,392)
Depreciation and amortization	1	0	0
Interest income	(349)	(189)	(97)
Interest charges	(349)	(188)	(96)
Federal and state income tax expense (benefit)	0	0	0
Income from continuing operations, net of income taxes	0	0	(2)
Income from discontinued operations, net of income taxes	0	0	0
Net income (loss)	0	0	(2)
Additions to property, plant, and equipment	0	0	0
Equity Method Investments	848,952	467,329	320,348
Goodwill	0	0	0
Total segment assets	$ 776,596	$ 309,311	$ 181,683