Summary of Significant Accounting Policies - Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Public Utility, Property, Plant and Equipment [Line Items]
Capitalized software, net	$ 168,600	$ 172,700
Capitalized software costs, amortization	12,228	11,878	$ 11,015
Property, Plant and Equipment, Net
Generation	2,737,597	2,704,536
Distribution	1,429,374	1,494,411
Transmission	811,199	797,694
Other utility plant	457,339	412,577
Other property, plant, and equipment	9,557	7,504
Total property, plant, and equipment	5,445,066	5,416,722
Accumulated depreciation	(946,576)	(700,991)
Net property, plant, and equipment	4,498,490	4,715,731
Acadia Unit 1 acquisition costs
Public Utilities, Property, Plant and Equipment, Acquisition Adjustments
Plant acquisition adjustment	76,116	76,116
Accumulated amortization	(21,383)	(18,201)
Net plant acquisition adjustment	$ 54,733	57,915
MINIMUM
Utility Plants
Generation	10 years
Distribution	15 years
Transmission	5 years
Other utility plant	5 years
Other property, plant, and equipment	5 years
MAXIMUM
Utility Plants
Generation	55 years
Distribution	50 years
Transmission	55 years
Other utility plant	45 years
Other property, plant, and equipment	45 years
CLECO POWER
Public Utility, Property, Plant and Equipment [Line Items]
Capitalized software, net	$ 162,300	167,400
Capitalized software costs, amortization	11,614	11,268	$ 10,379
Property, Plant and Equipment, Net
Generation	2,321,640	2,314,285
Distribution	1,866,662	1,933,389
Transmission	1,000,783	988,122
Other utility plant	547,441	509,693
Total property, plant, and equipment	5,736,526	5,745,489
Accumulated depreciation	(2,082,153)	(1,919,766)
Net property, plant, and equipment	3,654,373	3,825,723
CLECO POWER | Acadia Unit 1 acquisition costs
Public Utilities, Property, Plant and Equipment, Acquisition Adjustments
Plant acquisition adjustment	95,578	95,578
Accumulated amortization	(40,846)	(37,663)
Net plant acquisition adjustment	$ 54,732	$ 57,915
CLECO POWER | MINIMUM
Utility Plants
Generation	10 years
Distribution	15 years
Transmission	5 years
Other utility plant	5 years
Other property, plant, and equipment	5 years
CLECO POWER | MAXIMUM
Utility Plants
Generation	55 years
Distribution	50 years
Transmission	55 years
Other utility plant	45 years
Other property, plant, and equipment	45 years