Pension Plan and Employee Benefits - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
401(k) one time benefit, percent of employee's gross pay	30.00%	30.00%		30.00%		30.00%
401(k) Plan expense, additional cost	$ 200,000
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Pension contributions required through 2025					$ 5,400,000
Special/contractual termination benefits, percent increase in benefits	1000.00%	1000.00%		1000.00%		1000.00%
Special/contractual termination benefits			$ 0	$ 3,270,000	0	$ 3,270,000
Defined benefit plan contributions by employer			4,013,000	10,050,000	12,040,000	23,610,000
Pension Plan | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Special/contractual termination benefits		$ 2,400,000
Pension Plan | Support Group
Defined Benefit Plan Disclosure [Line Items]
Special/contractual termination benefits		$ 900,000
Pension Plan | Other Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer			800,000	1,800,000	2,400,000	3,600,000
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Special/contractual termination benefits			0	0	0	0
Defined benefit plan contributions by employer			1,225,000	1,319,000	3,674,000	3,924,000
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	3,300,000	3,600,000
SERP
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer			935,000	946,000	2,805,000	2,837,000
SERP | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer			$ 100,000	$ 100,000	$ 400,000	$ 400,000