Pension Plan and Employee Benefits - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension contributions required through 2025	$ 0
Defined benefit plan contributions by employer	4,018,000	$ 6,203,000
Pension Plan | Other Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	800,000	900,000
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	1,225,000	1,302,000
Assets held-in-trust, noncurrent	0
Other Benefits Plan | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	1,100,000	1,200,000
SERP
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	935,000	1,643,000
SERP | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 100,000	$ 300,000