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Income Taxes, Valuation Allowance (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Cleco Power [Member]    
Valuation Allowance [Line Items]    
Tax Credit Carryforward, Valuation Allowance $ 0us-gaap_TaxCreditCarryforwardValuationAllowance
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		  
General Business Tax Credit Carryforward [Member]    
Valuation Allowance [Line Items]    
Deferred tax asset, NMTC carryforwards 95.4us-gaap_TaxCreditCarryforwardDeferredTaxAsset
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_GeneralBusinessMember		 95.4us-gaap_TaxCreditCarryforwardDeferredTaxAsset
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_GeneralBusinessMember
Tax Credit Carryforward, Valuation Allowance $ 0us-gaap_TaxCreditCarryforwardValuationAllowance
/ us-gaap_TaxCreditCarryforwardAxis
= us-gaap_GeneralBusinessMember