Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 300,953	$ 242,416	$ 585,387	$ 510,535
Total revenue unrelated to contracts with customers	20,808	9,769	31,618	18,492
Operating revenue, net	321,761	252,185	617,005	529,027
Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	268,992	209,948	517,286	411,392
Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	131,252	103,426	245,906	195,438
Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	85,209	67,582	166,313	135,728
Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	47,816	35,870	95,844	75,271
Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,715	3,618	9,223	7,350
Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		(548)		(2,395)
Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	17,570	17,892	38,248	65,424
Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	10,112	9,458	21,036	23,352
Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	15,981	7,806	23,965	15,880
Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	4,827	1,963	7,653	2,612
Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,279	5,118	8,817	10,367
OPERATING SEGMENTS | CLECO POWER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	301,394	244,124	586,268	523,435
Total revenue unrelated to contracts with customers	19,070	8,588	28,025	17,310
Operating revenue, net	320,464	252,712	614,293	540,745
OPERATING SEGMENTS | CLECO POWER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	245	1,522	490	10,391
OPERATING SEGMENTS | CLECO POWER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	268,992	209,948	517,286	411,392
OPERATING SEGMENTS | CLECO POWER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	131,252	103,426	245,906	195,438
OPERATING SEGMENTS | CLECO POWER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	85,209	67,582	166,313	135,728
OPERATING SEGMENTS | CLECO POWER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	47,816	35,870	95,844	75,271
OPERATING SEGMENTS | CLECO POWER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,715	3,618	9,223	7,350
OPERATING SEGMENTS | CLECO POWER | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers		(548)		(2,395)
OPERATING SEGMENTS | CLECO POWER | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	17,756	18,078	38,620	67,933
OPERATING SEGMENTS | CLECO POWER | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	10,112	9,458	21,036	23,352
OPERATING SEGMENTS | CLECO POWER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	15,981	7,806	23,965	15,880
OPERATING SEGMENTS | CLECO POWER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	3,089	782	4,060	1,430
OPERATING SEGMENTS | CLECO POWER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,289	5,118	8,836	10,367
OTHER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	16,408	27,570	37,053	54,914
Total revenue unrelated to contracts with customers	1,738	1,181	3,593	1,182
Operating revenue, net	18,146	28,751	40,646	56,096
OTHER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	16,594	27,756	37,425	57,423
OTHER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	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	(186)	(186)	(372)	(2,509)
OTHER | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0	0	0
OTHER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	1,738	1,181	3,593	1,182
OTHER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(16,849)	(29,278)	(37,934)	(67,814)
Total revenue unrelated to contracts with customers	0	0	0	0
Operating revenue, net	(16,849)	(29,278)	(37,934)	(67,814)
ELIMINATIONS | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(16,839)	(29,278)	(37,915)	(67,814)
ELIMINATIONS | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	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	0
ELIMINATIONS | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0	0	0
ELIMINATIONS | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0	0	0
ELIMINATIONS | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ (10)	$ 0	$ (19)	$ 0