Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Uncollectible Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	$ 2,758	$ 3,005	$ 814
ADDITIONS	5,463	6,176	2,323
DEDUCTIONS	6,919	6,423	132
BALANCE AT END OF PERIOD	1,302	2,758	3,005
Allowance for Uncollectible Accounts | CLECO POWER
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	2,758	3,005	814
ADDITIONS	5,463	6,176	2,323
DEDUCTIONS	6,919	6,423	132
BALANCE AT END OF PERIOD	1,302	2,758	3,005
Unrestricted Storm Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	0	1,100	3,672
ADDITIONS	0	12,329	4,000
DEDUCTIONS	0	13,429	6,572
BALANCE AT END OF PERIOD	0	0	1,100
Unrestricted Storm Reserve | CLECO POWER
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	0	1,100	3,672
ADDITIONS	0	12,329	4,000
DEDUCTIONS	0	13,429	6,572
BALANCE AT END OF PERIOD	0	0	1,100
Restricted Storm Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	0	12,285	15,485
ADDITIONS	0	44	800
DEDUCTIONS	0	12,329	4,000
BALANCE AT END OF PERIOD	0	0	12,285
Restricted Storm Reserve | CLECO POWER
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF PERIOD	0	12,285	15,485
ADDITIONS	0	44	800
DEDUCTIONS	0	12,329	4,000
BALANCE AT END OF PERIOD	$ 0	$ 0	$ 12,285