Regulation and Rates - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jun. 16, 2021	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Jul. 01, 2021	Aug. 31, 2020	Jul. 31, 2019
Regulation and Rates [Line Items]
Refund due to customers		$ 5,845	$ 5,682
Current regulatory liabilities		44,072	44,072
FRP
Regulation and Rates [Line Items]
Refund due to customers		1,230	1,229
Cleco Katrina/Rita storm recovery charges
Regulation and Rates [Line Items]
Refund due to customers		1,611	1,611
CLECO POWER
Regulation and Rates [Line Items]
Refund due to customers		5,845	5,682				$ 79,200
Regulatory liabilities		80,926	95,544
Current regulatory liabilities		44,072	44,072
CLECO POWER | FRP
Regulation and Rates [Line Items]
Refund due to customers		1,230	1,229
CLECO POWER | Cleco Katrina/Rita storm recovery charges
Regulation and Rates [Line Items]
Refund due to customers		1,611	$ 1,611
CLECO POWER | LPSC
Regulation and Rates [Line Items]
TCJA, bill credit per month						$ 7,000
Bill credit related to unprotected excess ADIT						4,400
Bill credit per month related to change in federal statutory tax rate						$ 2,600
Estimated refund for the tax-related benefits from the TCJA		2,100
CLECO POWER | LPSC | Merger Commitments, cost savings
Regulation and Rates [Line Items]
Regulatory liabilities		$ 4,300
CLECO POWER | LPSC | FRP
Regulation and Rates [Line Items]
Target ROE allowed by FRP		9.50%	9.50%	10.00%
Percentage of retail earnings within range to be returned to customers		60.00%	60.00%	60.00%
ROE for customer credit, low range		10.00%	10.00%	10.90%
ROE for customer credit, high range		10.50%	10.50%	11.75%
CLECO POWER | LPSC | FRP | Maximum
Regulation and Rates [Line Items]
Target ROE allowed by FRP		10.00%	10.00%	10.90%
CLECO POWER | LPSC | Excess ADIT
Regulation and Rates [Line Items]
Bill credit related to unprotected excess ADIT					$ 2,500
Regulatory liability, amortization period	3 years
Regulatory liabilities		$ 291,000
Current regulatory liabilities		$ 44,100