Variable Interest Entities - Summary of Cleco Securitization I Financial Statement Impact (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Interest accrued	$ 15,668		$ 15,203
Current	10,958		1,674
Long-term debt and finance leases due within one year	261,506		93,455
Long-term debt and finance leases, net	3,313,759		3,390,033
Member’s equity	2,978,446	$ 3,099,914	2,954,156	$ 2,856,380	$ 2,777,978	$ 2,757,023
Storm recover property
Variable Interest Entity [Line Items]
Intangible assets	415,946		0
VIE, Primary Beneficiary - Cleco Securitization I
Variable Interest Entity [Line Items]
Interest accrued	474,000
Current	4,246,000
Long-term debt and finance leases due within one year	3,204,000
Long-term debt and finance leases, net	414,871,000
Member’s equity	1,643,000
VIE, Primary Beneficiary - Cleco Securitization I | Storm recover property
Variable Interest Entity [Line Items]
Intangible assets	415,946,000
CLECO POWER
Variable Interest Entity [Line Items]
Interest accrued	5,536		5,080
Current	10,958		1,674
Long-term debt and finance leases due within one year	28,985		25,755
Long-term debt and finance leases, net	1,892,407		1,800,854
Member’s equity	1,991,005	$ 1,987,930	1,948,537	$ 1,854,598	$ 1,826,826	$ 1,807,879
CLECO POWER | Storm recover property
Variable Interest Entity [Line Items]
Intangible assets	415,946		$ 0
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I
Variable Interest Entity [Line Items]
Interest accrued	474,000
Current	4,246,000
Long-term debt and finance leases due within one year	3,204,000
Long-term debt and finance leases, net	414,871,000
Member’s equity	1,643,000
CLECO POWER | VIE, Primary Beneficiary - Cleco Securitization I | Storm recover property
Variable Interest Entity [Line Items]
Intangible assets	$ 415,946,000