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The Company (Details)
customer in Thousands
Dec. 31, 2018
generationunit
customer
entity
MW
Organization, Consolidation and Presentation of Financial Statements [Line Items]  
Number of transmission interconnection facility subsidiaries | entity 2
CLECO POWER  
Organization, Consolidation and Presentation of Financial Statements [Line Items]  
Number of generating units owned | generationunit 9
Nameplate capacity of all generating units (MW) | MW 3,310
Approximate number of customers served | customer 291
Ownership interest in lignite entity 50.00%