Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 276,760	$ 378,705	$ 587,289	$ 689,959
Total revenue unrelated to contracts with customers	8,035	6,048	18,088	7,421
Operating revenue, net	284,795	384,753	605,377	697,380
Electric customer credits	736	129	1,386	265
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	212,160	270,505	450,347	509,729
Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	103,144	131,813	210,340	244,236
Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	68,067	84,336	145,724	160,870
Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	37,615	50,188	87,025	96,462
Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,070	4,297	8,644	8,426
Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(736)	(129)	(1,386)	(265)
Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	46,094	89,514	100,357	142,458
Transmission, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	13,955	13,688	26,485	27,580
Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	1,799	6,048	2,626	7,421
Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,551	4,998	10,100	10,192
Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	6,236		15,462
OPERATING SEGMENTS
Disaggregation of Revenue [Line Items]
Operating revenue, net	288,816	388,799
Electric customer credits	736	129
OPERATING SEGMENTS | CLECO POWER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	280,782	382,753	595,419	697,885
Total revenue unrelated to contracts with customers	8,034	6,046	18,086	7,419
Operating revenue, net	288,816	388,799	613,505	705,304
Electric customer credits	736	129	1,386	265
OPERATING SEGMENTS | CLECO POWER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	1,635	1,628	3,323	3,087
OPERATING SEGMENTS | CLECO POWER | Total retail revenue | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	212,160	270,505	450,347	509,729
OPERATING SEGMENTS | CLECO POWER | Residential | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	103,144	131,813	210,340	244,236
OPERATING SEGMENTS | CLECO POWER | Commercial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	68,067	84,336	145,724	160,870
OPERATING SEGMENTS | CLECO POWER | Industrial | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	37,615	50,188	87,025	96,462
OPERATING SEGMENTS | CLECO POWER | Other retail | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,070	4,297	8,644	8,426
OPERATING SEGMENTS | CLECO POWER | Electric customer credits | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(736)	(129)	(1,386)	(265)
OPERATING SEGMENTS | CLECO POWER | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	48,481	91,934	105,164	147,298
OPERATING SEGMENTS | CLECO POWER | Transmission, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	13,955	13,688	26,485	27,580
OPERATING SEGMENTS | CLECO POWER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	1,798	6,046	2,624	7,419
OPERATING SEGMENTS | CLECO POWER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	4,551	4,998	10,100	10,191
OPERATING SEGMENTS | CLECO POWER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	6,236		15,462
OTHER
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	26,515	23,332	51,609	48,306
Total revenue unrelated to contracts with customers	1	2	2	2
Operating revenue, net	26,516	23,334	51,611	48,308
Electric customer credits	0	0	0	0
OTHER | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	28,902	25,752	56,416	53,145
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	0	0
OTHER | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(2,387)	(2,420)	(4,807)	(4,840)
OTHER | Transmission, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
OTHER | Other
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	1	2	2	2
OTHER | Other | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	1
OTHER | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	0		0
ELIMINATIONS
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(30,537)	(27,380)	(59,739)	(56,232)
Total revenue unrelated to contracts with customers	0	0	0	0
Operating revenue, net	(30,537)	(27,380)	(59,739)	(56,232)
Electric customer credits	0	0	0	0
ELIMINATIONS | Affiliate
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(30,537)	(27,380)	(59,739)	(56,232)
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	0	0
ELIMINATIONS | Wholesale, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
ELIMINATIONS | Transmission, net | Nonrelated Party
Disaggregation of Revenue [Line Items]
Total revenue from 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	0	$ 0	0	$ 0
ELIMINATIONS | Securitization
Disaggregation of Revenue [Line Items]
Total revenue unrelated to contracts with customers	$ 0		$ 0