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Debt - Narrative (Details)
12 Months Ended
Jun. 23, 2022
USD ($)
Jun. 22, 2022
USD ($)
May 21, 2021
Feb. 04, 2019
USD ($)
Dec. 31, 2022
USD ($)
facility
Dec. 31, 2021
USD ($)
May 15, 2020
Debt [Line Items]              
Long-term debt outstanding, due within one year         $ 340,867,000 $ 93,455,000  
Short-term debt         $ 109,000,000 0  
Number of revolving credit facilities | facility         2    
NRG South Central              
Debt [Line Items]              
Repayments of long-term debt       $ 400,000,000      
Cleco Cajun Transaction commitments              
Debt [Line Items]              
Long-term debt due within one year         $ 65,600,000    
CLECO POWER              
Debt [Line Items]              
Long-term debt outstanding, due within one year         110,344,000 25,755,000  
Long-term debt due within one year         109,508,000 25,000,000  
Short-term debt         $ 45,000,000 0  
CLECO POWER | MAXIMUM              
Debt [Line Items]              
Debt to capital ratio         0.650   0.650
CLECO POWER | Line of Credit              
Debt [Line Items]              
Maximum borrowing capacity         $ 300,000,000    
Borrowings outstanding         45,000,000    
Outstanding borrowings         $ 0 0  
CLECO POWER | Line of Credit | Revolving Credit Facility              
Debt [Line Items]              
Commitment fees         0.15%    
Interest rate, potential additional interest         0.125%    
Commitment fee, potential additional fee         0.025%    
CLECO POWER | Line of Credit | LIBOR | Revolving Credit Facility              
Debt [Line Items]              
Basis spread on variable rate         1.25%    
CLECO POWER | Line of Credit | ABR | Revolving Credit Facility              
Debt [Line Items]              
Basis spread on variable rate         0.25%    
CLECO POWER | Senior notes, 3.08%, due 2023              
Debt [Line Items]              
Long-term debt outstanding, due within one year         $ 100,000,000    
Interest rate         3.08%    
Long-term debt due within one year         $ 100,000,000    
CLECO POWER | Cleco Securitization I, senior secured storm recovery bonds | Secured Debt              
Debt [Line Items]              
Long-term debt outstanding, due within one year         9,600,000    
Aggregate principal amount   $ 425,000,000          
Long-term debt due within one year         $ 9,600,000    
CLECO POWER | Cleco Securitization I, Senior Secured Storm Recovery Bonds, Tranche One | Secured Debt              
Debt [Line Items]              
Aggregate principal amount   $ 125,000,000          
Interest rate   4.016%          
Debt term   4 years 9 months 14 days          
CLECO POWER | Cleco Securitization I, Senior Secured Storm Recovery Bonds, Tranche Two | Secured Debt              
Debt [Line Items]              
Aggregate principal amount   $ 300,000,000          
Interest rate   4.646%          
Debt term   15 years          
CLECO POWER | Senior notes, floating rate, due 2023              
Debt [Line Items]              
Repayments of long-term debt $ 325,000,000            
CLECO POWER | Senior notes, 2.94%, due 2022              
Debt [Line Items]              
Interest rate         2.94%    
Repayments of long-term debt $ 25,000,000            
Cleco Holdings              
Debt [Line Items]              
Long-term debt due within one year         $ 230,524,000 67,700,000  
Cleco Holdings | MAXIMUM              
Debt [Line Items]              
Debt to capital ratio     0.650        
Cleco Holdings | Line of Credit              
Debt [Line Items]              
Maximum borrowing capacity         175,000,000    
Borrowings outstanding         64,000,000    
Line of credit facility, remaining borrowing capacity         475,000,000    
Outstanding borrowings         $ 0 $ 0  
Cleco Holdings | Line of Credit | Revolving Credit Facility              
Debt [Line Items]              
Commitment fees     0.275%        
Interest rate, potential additional interest     0.125%        
Commitment fee, potential additional fee     0.05%        
Cleco Holdings | Line of Credit | LIBOR | Revolving Credit Facility              
Debt [Line Items]              
Basis spread on variable rate         1.625%    
Cleco Holdings | Line of Credit | ABR | Revolving Credit Facility              
Debt [Line Items]              
Basis spread on variable rate         0.625%