Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 284,434	$ 268,119
Total revenue unrelated to contracts with customers	10,810	8,723
Operating revenue, net	295,244	276,842
Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	248,294	201,444
Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	114,654	92,012
Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	81,104	68,146
Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	48,028	39,401
Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,508	3,732
Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	(1,847)
Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	20,678	47,532
Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	10,924	13,894
Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	7,984	8,074
Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	2,826	649
Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,538	5,249
OPERATING SEGMENTS | CLECO POWER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	284,874	279,311
Total revenue unrelated to contracts with customers	8,955	8,723
Operating revenue, net	293,829	288,034
OPERATING SEGMENTS | CLECO POWER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	245	8,869
OPERATING SEGMENTS | CLECO POWER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	248,294	201,444
OPERATING SEGMENTS | CLECO POWER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	114,654	92,012
OPERATING SEGMENTS | CLECO POWER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	81,104	68,146
OPERATING SEGMENTS | CLECO POWER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	48,028	39,401
OPERATING SEGMENTS | CLECO POWER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,508	3,732
OPERATING SEGMENTS | CLECO POWER | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	(1,847)
OPERATING SEGMENTS | CLECO POWER | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	20,864	49,855
OPERATING SEGMENTS | CLECO POWER | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	10,924	13,894
OPERATING SEGMENTS | CLECO POWER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	7,984	8,074
OPERATING SEGMENTS | CLECO POWER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	971	649
OPERATING SEGMENTS | CLECO POWER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,547	5,249
OTHER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	20,645	27,344
Total revenue unrelated to contracts with customers	1,855	0
Operating revenue, net	22,500	27,344
OTHER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	20,831	29,667
OTHER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
OTHER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
OTHER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
OTHER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
OTHER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	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)	(2,323)
OTHER | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
OTHER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0
OTHER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	1,855	0
OTHER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(21,085)	(38,536)
Total revenue unrelated to contracts with customers	0	0
Operating revenue, net	(21,085)	(38,536)
ELIMINATIONS | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(21,076)	(38,536)
ELIMINATIONS | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	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
ELIMINATIONS | Transmission | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
ELIMINATIONS | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0
ELIMINATIONS | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0	0
ELIMINATIONS | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ (9)	$ 0