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Schedule I Financial Statements of Cleco Corporation, Debt (Details) (USD $)
1 Months Ended 12 Months Ended
Nov. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Debt [Abstract]      
Short-term debt outstanding   $ 0us-gaap_ShortTermBankLoansAndNotesPayable $ 0us-gaap_ShortTermBankLoansAndNotesPayable
Long-term Debt and Capital Lease Obligations, Including Current Maturities   1,370,000,000us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities 1,330,000,000us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Long-term Debt and Capital Lease Obligations, Current   18,272,000us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 17,182,000us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Line of Credit [Member]      
Debt [Abstract]      
Maximum borrowing capacity   550,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Cleco Corporation [Member]      
Debt [Abstract]      
Short-term debt outstanding   0us-gaap_ShortTermBankLoansAndNotesPayable
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_ShortTermBankLoansAndNotesPayable
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Long-term Debt and Capital Lease Obligations, Including Current Maturities   57,000,000us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
5,000,000us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Long-term Debt and Capital Lease Obligations, Current   0us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Cleco Corporation [Member] | Line of Credit [Member]      
Debt [Abstract]      
Maximum borrowing capacity     250,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
Write off of Deferred Debt Issuance Cost 1,000,000us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
   
Facility fees (in hundredths)   0.175%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Line of Credit Facility, Amount Outstanding   57,000,000us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Available borrowing capacity   $ 193,000,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Cleco Corporation [Member] | Line of Credit [Member] | LIBOR [Member]      
Debt [Abstract]      
All-in interest rate (in hundredths)   1.075%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
All-in interest rate (in hundredths)   1.245%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
 
Cleco Corporation [Member] | Line of Credit [Member] | ABR [Member]      
Debt [Abstract]      
All-in interest rate (in hundredths)   0.075%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LineOfCreditMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember