Pension Plan and Employee Benefits - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension contributions required through 2025			$ 5,400,000
Defined benefit plan contributions by employer	$ 4,009,000	$ 7,358,000	8,027,000	$ 13,561,000
Pension Plan | Other Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	800,000	900,000	1,600,000	1,800,000
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	1,225,000	1,302,000	2,449,000	2,605,000
Assets held-in-trust, noncurrent	0		0
Other Benefits Plan | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	1,100,000	1,200,000	2,200,000	2,400,000
SERP
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	935,000	249,000	1,870,000	1,891,000
SERP | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 100,000	$ 100,000	$ 300,000	$ 300,000