Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 1,264,960	$ 1,104,194	$ 1,198,472
Total revenue unrelated to contracts with customers	66,829	43,514	40,319
Operating revenue, net	1,331,789	1,147,708	1,238,791
Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,120,380	945,451	908,881
Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	538,704	453,518	469,099
Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	355,380	302,380	304,422
Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	207,490	177,176	179,506
Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	18,806	16,317	16,543
Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		(3,940)	(60,689)
Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	81,258	96,247	212,093
Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	44,494	43,004	56,701
Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	54,169	32,619	34,063
Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	12,660	10,895	6,256
Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	18,828	19,492	20,797
OTHER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	81,154	105,246	111,262
Total revenue unrelated to contracts with customers	5,312	8,162	5
Operating revenue, net	86,466	113,408	111,267
OTHER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	81,899	108,127	120,716
OTHER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		0	0
OTHER | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(745)	(2,881)	(9,454)
OTHER | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
OTHER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0	0
OTHER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	5,312	8,162	5
OTHER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(82,905)	(120,601)	(129,620)
Total revenue unrelated to contracts with customers	0	(1)	(1)
Operating revenue, net	(82,905)	(120,602)	(129,621)
ELIMINATIONS | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(82,875)	(120,579)	(129,620)
ELIMINATIONS | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		0	0
ELIMINATIONS | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0
ELIMINATIONS | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0	0
ELIMINATIONS | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	(1)	(1)
ELIMINATIONS | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(30)	(22)	0
CLECO POWER | Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,266,711	1,119,549	1,216,830
Total revenue unrelated to contracts with customers	61,517	35,353	40,315
Operating revenue, net	1,328,228	1,154,902	1,257,145
CLECO POWER | Operating Segments | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	976	12,452	8,904
CLECO POWER | Operating Segments | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,120,380	945,451	908,881
CLECO POWER | Operating Segments | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	538,704	453,518	469,099
CLECO POWER | Operating Segments | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	355,380	302,380	304,422
CLECO POWER | Operating Segments | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	207,490	177,176	179,506
CLECO POWER | Operating Segments | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	18,806	16,317	16,543
CLECO POWER | Operating Segments | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		(3,940)	(60,689)
CLECO POWER | Operating Segments | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	82,003	99,128	221,547
CLECO POWER | Operating Segments | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	44,494	43,004	56,701
CLECO POWER | Operating Segments | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	54,169	32,619	34,063
CLECO POWER | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	7,348	2,734	6,252
CLECO POWER | Operating Segments | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 18,858	$ 19,514	$ 20,797