Regulation and Rates - Provision for Rate Refund (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Jul. 31, 2019
Regulation and Rates [Line Items]
Provision for rate refund	$ 13,256	$ 5,682
Cleco Katrina/Rita storm recovery charges
Regulation and Rates [Line Items]
Provision for rate refund	0	1,611
FRP
Regulation and Rates [Line Items]
Provision for rate refund	95	1,229
Site-specific industrial customer
Regulation and Rates [Line Items]
Provision for rate refund	752	833
St. Mary Clean Energy Center
Regulation and Rates [Line Items]
Provision for rate refund	10,400	0
TCJA
Regulation and Rates [Line Items]
Provision for rate refund	2,057	2,057
CLECO POWER
Regulation and Rates [Line Items]
Provision for rate refund	13,256	5,682		$ 79,200
CLECO POWER | Cleco Katrina/Rita storm recovery charges
Regulation and Rates [Line Items]
Provision for rate refund	0	1,611
CLECO POWER | FRP
Regulation and Rates [Line Items]
Provision for rate refund	95	1,229	$ 1,200
CLECO POWER | Site-specific industrial customer
Regulation and Rates [Line Items]
Provision for rate refund	752	833
CLECO POWER | St. Mary Clean Energy Center
Regulation and Rates [Line Items]
Provision for rate refund	10,400	0
CLECO POWER | TCJA
Regulation and Rates [Line Items]
Provision for rate refund	$ 2,057	$ 2,057