Summary of Significant Accounting Policies - Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents Items [Line Items]
Current	$ 10,958	$ 1,674
Non-current	113,370	745
Total restricted cash and cash equivalents	124,328	2,419
CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	10,958	1,674
Non-current	112,623	0
Total restricted cash and cash equivalents	123,581	1,674
Cleco Katrina/Rita storm recovery surcharge
Restricted Cash and Cash Equivalents Items [Line Items]
Current	1,677	1,674
Cleco Katrina/Rita storm recovery surcharge | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	1,677	1,674
Cleco Power’s storm restoration costs - Hurricane Ida
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,281	0
Non-current	6,091	0
Cleco Power’s storm restoration costs - Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,281	0
Non-current	6,091	0
Diversified Lands’ mitigation escrow
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	22	22
Cleco Cajun’s defense fund
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	725	723
Future storm restoration costs
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	102,286	0
Future storm restoration costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	102,286	0
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	4,246	0
Cleco Securitization I’s operating expenses and storm recovery bond issuance costs | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current	4,246	$ 0
Restoration costs, future storm and Hurricane Ida | CLECO POWER
Restricted Cash and Cash Equivalents Items [Line Items]
Current	9,300
Non-current	$ 108,400