Fair Value Accounting Instruments - Money Market Funds (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value, Concentration of Risk, Cash and Cash Equivalents	$ 82,690	$ 39,779
CLECO POWER
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair Value, Concentration of Risk, Cash and Cash Equivalents	46,923	6,813
Restricted Cash And Cash Equivalents, Current [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Restricted cash and cash equivalents	15,578	23,548
Restricted Cash And Cash Equivalents, Current [Member] | CLECO POWER
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Restricted cash and cash equivalents	15,578	23,548
Restricted Cash And Cash Equivalents, Noncurrent [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Restricted cash and cash equivalents	110,503	109,414
Restricted Cash And Cash Equivalents, Noncurrent [Member] | CLECO POWER
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Restricted cash and cash equivalents	$ 110,481	$ 109,391