Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Line Items]
Receivable, threshold period past due	20 days
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1,302	$ 2,758
Current period provision	3,362	4,003
Charge-offs	(4,800)	(6,919)
Recovery	1,283	1,460
Ending balance	1,147	1,302
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,638	1,638
Current period provision	0	0
Charge-offs	0	0
Recovery	0	0
Ending balance	1,638	1,638
Receivable, Allowance For Credit Loss [Roll Forward]
Beginning balance	2,940	4,396
Current period provision	3,362	4,003
Charge-offs	(4,800)	(6,919)
Recovery	1,283	1,460
Ending balance	2,785	2,940
Cleco Power
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,302	2,758
Current period provision	3,362	4,003
Charge-offs	(4,800)	(6,919)
Recovery	1,283	1,460
Ending balance	$ 1,147	$ 1,302