Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) - Cleco Power - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	$ 13,612	$ 14,605
Accounts payable - affiliate	69,729	72,068
Cleco Holdings
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	10,347	10,353
Accounts payable - affiliate	59,627	57,713
Support Group
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	2,473	3,248
Accounts payable - affiliate	10,038	14,355
Cleco Cajun
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	792	1,004
Accounts payable - affiliate	$ 64	$ 0