Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
Interest payable related to uncertain tax positions	$ 0	$ 0
Interest expense related to uncertain tax positions	0	0	$ 0
Liability for uncertain tax positions	0	0
Penalties recognized	0	0	0
Federal
Valuation Allowance [Line Items]
Operating loss carryforwards	318,000,000	538,500,000
State
Valuation Allowance [Line Items]
Operating loss carryforwards	199,600,000	348,200,000
Cleco Power
Valuation Allowance [Line Items]
Interest payable related to uncertain tax positions	0	0
Interest expense related to uncertain tax positions	0	0	$ 0
Liability for uncertain tax positions	0	0
Cleco Power | Federal
Valuation Allowance [Line Items]
Operating loss carryforwards	220,800,000	336,100,000
Cleco Power | State
Valuation Allowance [Line Items]
Operating loss carryforwards	199,600,000	348,200,000
NMTC
Valuation Allowance [Line Items]
NMTC carryforwards	79,000,000	$ 88,200,000
Valuation allowance	0
NMTC | Cleco Power
Valuation Allowance [Line Items]
Valuation allowance	$ 0