The Company (Details) customer in Thousands	Dec. 31, 2020 entity customer generation_unit 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 | generation_unit	10
Nameplate capacity of all generating units (MW) | MW	3,360
Approximate number of customers served | customer	290
Ownership interest in lignite entity	50.00%
Cleco Cajun
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of generating units owned | generation_unit	14
Nameplate capacity of all generating units (MW) | MW	3,379