Affiliate Transactions - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	$ 3,041,000	$ 1,663,000
Accounts payable - affiliate	51,297,000	41,283,000
Contributions from member			$ 384,900,000
Cleco Holdings
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	2,600,000	1,700,000
Accounts payable - affiliate	51,300,000	41,300,000
CLECO POWER
Affiliate Transaction [Line Items]
Accounts receivable - affiliate	13,612,000	14,605,000
Accounts payable - affiliate	69,729,000	72,068,000
Contributions from member			20,000,000
CLECO POWER | Oxbow
Affiliate Transaction [Line Items]
Due to affiliate (less than)	100,000	300,000
CLECO POWER | Support Group | Oxbow
Affiliate Transaction [Line Items]
Cost of mineral rights and land leases	2,700,000	17,400,000
CLECO POWER | Cleco Holdings
Affiliate Transaction [Line Items]
Contributions from member	0	0	20,000,000
Contributions from member	0	0	0
Cleco Holdings | Cleco Holdings
Affiliate Transaction [Line Items]
Contributions from member	$ 0	$ 0	$ 0