Intangible Assets, Intangible Liabilities, and Goodwill - Narrative (Details)			1 Months Ended	12 Months Ended
	Aug. 01, 2022 USD ($)	Jun. 22, 2022 USD ($)	Aug. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2008 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Apr. 13, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets						$ 500,000
Residual value									$ 0
Impairments for intangibles				$ 0	$ 0	0
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]					Depreciation and amortization
Goodwill				1,490,797,000	$ 1,490,797,000	1,490,797,000				$ 1,490,000,000
Impairment of goodwill	$ 0
Storm recovery property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired		$ 415,900,000
Amortization of intangible assets				2,800,000
Intangible assets				413,123,000	0
Power supply agreements
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets				25,600,000	25,600,000	25,600,000
Residual value				$ 0
Power supply agreements | MINIMUM
Finite-Lived Intangible Assets [Line Items]
Intangible asset expected useful life				7 years
Power supply agreements | MAXIMUM
Finite-Lived Intangible Assets [Line Items]
Intangible asset expected useful life				19 years
Trade name
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets				$ 0	3,897,000	255,000
Impairments for intangibles			$ 3,800,000
Intangible assets								$ 0
Trade name | Level 3 | Average rate | Discounted Cash Flow
Finite-Lived Intangible Assets [Line Items]
Measurement input			0.08
Cleco Katrina/Rita | Right To Bill And Collect Storm Recovery Charges From Customers
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired							$ 177,500,000
Cleco Katrina/Rita | Right to Bill and Collect, Storm Recovery Charges From Customers, Net of Financing Costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired							176,000,000
Cleco Katrina/Rita | Financing costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired							$ 1,500,000
Cleco Power
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets						$ 500,000
Cleco Power | Storm recovery property
Finite-Lived Intangible Assets [Line Items]
Intangible assets				$ 413,123,000	$ 0
CLECO CAJUN | LTSA
Finite-Lived Intangible Assets [Line Items]
Intangible liabilities, remaining life				7 years
CLECO CAJUN | Power supply agreements
Finite-Lived Intangible Assets [Line Items]
Residual value				$ 0
CLECO CAJUN | Power supply agreements | MINIMUM
Finite-Lived Intangible Assets [Line Items]
Intangible assets, remaining life				6 years
CLECO CAJUN | Power supply agreements | MAXIMUM
Finite-Lived Intangible Assets [Line Items]
Intangible assets, remaining life				8 years