Storm Restoration, Securitization, and Cost Recovery (Details) customer in Thousands, $ in Thousands			1 Months Ended	2 Months Ended	12 Months Ended
	Aug. 29, 2021 USD ($) customer	May 19, 2021 USD ($)	May 31, 2021	Oct. 28, 2020 USD ($) hurricane	Dec. 31, 2021 USD ($)	Sep. 28, 2021 USD ($)	Sep. 11, 2021	Aug. 05, 2021 USD ($)	Mar. 29, 2021 USD ($)	Dec. 31, 2020 USD ($)
Cleco Power
Unusual or Infrequent Item, or Both [Line Items]
Total regulatory assets					$ 759,165					$ 456,034
Securitized storm restoration costs								$ 342,000
Securitized storm restoration costs, reserve for future costs								$ 100,000
Cleco Power | Hurricane Laura, Delta and Zeta
Unusual or Infrequent Item, or Both [Line Items]
Total regulatory assets					74,700
Cleco Power | Deferred storm restoration costs - Winter Storms Uri & Viola
Unusual or Infrequent Item, or Both [Line Items]
Total regulatory assets					1,912					0
Cleco Power | Deferred storm restoration costs - Hurricane Ida
Unusual or Infrequent Item, or Both [Line Items]
Total regulatory assets					$ 37,617					$ 0
Natural Disasters and Other Casualty Events
Unusual or Infrequent Item, or Both [Line Items]
Capitalization percentage				63.00%
Capitalized storm restoration costs, interim storm recovery amount		$ 16,000
Natural Disasters and Other Casualty Events | Cleco Power
Unusual or Infrequent Item, or Both [Line Items]
Number of hurricanes | hurricane				3
Estimate of storm restoration costs				$ 239,800
Capitalized storm restoration costs				$ 150,400
Deferred storm restoration costs - Winter Storms Uri & Viola
Unusual or Infrequent Item, or Both [Line Items]
Capitalization percentage					80.00%
Deferred storm restoration costs - Winter Storms Uri & Viola | Cleco Power
Unusual or Infrequent Item, or Both [Line Items]
Estimate of storm restoration costs					$ 10,100
Capitalized storm restoration costs					8,100				$ 50,000
Fuel and purchased power costs					$ 55,000
Capitalized storm restoration costs, amortization period			12 months
Deferred storm restoration costs - Hurricane Ida | Cleco Power
Unusual or Infrequent Item, or Both [Line Items]
Estimate of storm restoration costs	$ 92,000
Capitalization percentage					56.00%
Capitalized storm restoration costs					$ 52,100
Number of customers affected with power outage | customer	100
Percentage of customers affected by the hurricane with power restored							100.00%
Securitized storm restoration costs, reserve for future costs						$ 100,000