Regulatory Assets and Liabilities - Narrative (Details) $ in Thousands		24 Months Ended
	Jun. 22, 2022 USD ($)	Dec. 31, 2021 USD ($) storm hurricane	Oct. 01, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 21, 2022 USD ($)	Jul. 31, 2019 USD ($)
Regulatory Liabilities [Line Items]
Provision for rate refund		$ 5,682		$ 13,256
CLECO POWER
Regulatory Liabilities [Line Items]
Securitized storm restoration costs, reserve for future costs				102,600
Provision for rate refund		5,682		13,256		$ 79,200
Regulatory assets		759,165		675,386
CLECO POWER | St. Mary Clean Energy Center
Regulatory Liabilities [Line Items]
Regulatory assets		$ 6,089		8,607
CLECO POWER | St. Mary Clean Energy Center | LPSC
Regulatory Liabilities [Line Items]
Disallowed recovery costs					$ 15,000
Impairment of regulatory asset					13,800
Provision for rate refund				10,400	10,400
CLECO POWER | St. Mary Clean Energy Center, refund liability
Regulatory Liabilities [Line Items]
Regulatory assets				3,800
CLECO POWER | St. Mary Clean Energy Center, refund liability | LPSC
Regulatory Liabilities [Line Items]
Regulatory assets				3,800	$ 3,800
CLECO POWER | St. Mary Clean Energy Center, refund liability | Subsequent event
Regulatory Liabilities [Line Items]
Regulatory assets			$ 3,800
CLECO POWER | St. Mary Clean Energy Center, original revenue requirement
Regulatory Liabilities [Line Items]
Regulatory assets				4,800
CLECO POWER | Hurricanes
Regulatory Liabilities [Line Items]
Number of hurricanes | hurricane		4
Number of severe winter storms | storm		2
CLECO POWER | Deferred storm restoration costs - Hurricane Ida
Regulatory Liabilities [Line Items]
Securitized storm restoration costs, amount withdrawn	$ 79,600
Securitized storm restoration costs, reserve for future costs				15,400
Securitized storm restoration costs, reserve for future costs, current				$ 9,400