Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Credit Losses, Other and Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	$ 1,252	$ 1,190	$ 1,147	$ 1,302
Current period provision	1,106	939	3,252	2,149
Charge-offs	(325)	(894)	(3,071)	(2,899)
Recovery	215	263	920	946
Accounts receivable, ending balance	2,248	1,498	2,248	1,498
OTHER
Other, beginning balance	1,638	1,638	1,638	1,638
Current period provision	0	0	0	0
Charge-offs	0	0	0	0
Recovery	0	0	0	0
Other, ending balance	1,638	1,638	1,638	1,638
TOTAL
Total, beginning balance	2,890	2,828	2,785	2,940
Current period provision	1,106	939	3,252	2,149
Charge-offs	(325)	(894)	(3,071)	(2,899)
Recovery	215	263	920	946
Total, ending balance	3,886	3,136	3,886	3,136
CLECO POWER
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	1,252	1,190	1,147	1,302
Current period provision	1,106	939	3,252	2,149
Charge-offs	(325)	(894)	(3,071)	(2,899)
Recovery	215	263	920	946
Accounts receivable, ending balance	$ 2,248	$ 1,498	$ 2,248	$ 1,498