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Income Taxes - Effective Tax Rate Reconciliation (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Effective Income Tax Rate [Line Items]        
Effective tax rate 11.10% 23.90% 0.40% 23.40%
CLECO POWER        
Effective Income Tax Rate [Line Items]        
Effective tax rate 24.60% 24.90% (1.70%) 24.10%