Income Taxes - Effective Tax Rate Reconciliation (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Effective Income Tax Rate [Line Items]
Effective tax rate	20.30%	29.40%	12.40%	26.80%
CLECO POWER
Effective Income Tax Rate [Line Items]
Effective tax rate	1.00%	33.40%	(0.20%)	28.80%