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Schedule I Financial Statements of Cleco Corporation, Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]  
Percent of total consolidated net assets over which parent company only financial statements are required (in hundredths) 25.00%cnl_PercentOfTotalConsolidatedNetAssetsOverWhichParentCompanyOnlyFinancialStatementsAreRequired
Cleco Corporation [Member]  
Summary of Significant Accounting Policies [Abstract]  
Amount of restricted net assets for consolidated subsidiaries 673.9cnl_AmountOfRestrictedNetAssetsForConsolidatedSubsidiaries
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= us-gaap_ParentCompanyMember
Percent of total consolidated net assets over which parent company only financial statements are required (in hundredths) 25.00%cnl_PercentOfTotalConsolidatedNetAssetsOverWhichParentCompanyOnlyFinancialStatementsAreRequired
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= us-gaap_ParentCompanyMember