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Fair Value Accounting, Derivatives (Details) (USD $)
0 Months Ended 3 Months Ended
Nov. 14, 2011
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Forward Starting Interest Rate Swap [Member]
       
Forward Starting Interest Rate Swap [Abstract]        
Derivative Liabilities   $ 400,000   $ 2,600,000
Cleco Power [Member]
       
Forward Starting Interest Rate Swap [Abstract]        
Impact to earnings due to ineffectiveness     0  
Cleco Power [Member] | Forward Starting Interest Rate Swap [Member]
       
Forward Starting Interest Rate Swap [Abstract]        
Amount of original notional amount issuance delayed 50,000,000      
Rate basis spot 30-year all-in swap      
Fixed iterest rate (in hundreths) 3.05%      
Notional amount 50,000,000      
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion   1,800,000 4,700,000  
Derivative Liabilities   400,000   2,600,000
Gain (loss) on forward starting interest rate swap remaining in accumulated other comprehensive income (loss)   (400,000)    
Impact to earnings due to ineffectiveness   $ 0