Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	$ 3,046	$ 3,041
ACCOUNTS PAYABLE	11,295	51,297
CLECO POWER
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	1,728	13,612
ACCOUNTS PAYABLE	19,549	69,729
CLECO POWER | Cleco Holdings
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	141	10,347
ACCOUNTS PAYABLE	9,335	59,627
CLECO POWER | Support Group
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	666	2,473
ACCOUNTS PAYABLE	10,213	10,038
CLECO POWER | Cleco Cajun
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	921	792
ACCOUNTS PAYABLE	$ 1	$ 64