Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
ACCOUNTS PAYABLE	$ 33,780	$ 33,780
CLECO POWER
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	13,697	14,481
ACCOUNTS PAYABLE	10,966	14,123
CLECO POWER \| Cleco Holdings
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	10,368	10,351
ACCOUNTS PAYABLE	163	194
CLECO POWER \| Support Group
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	2,462	3,172
ACCOUNTS PAYABLE	10,798	13,890
CLECO POWER \| Cleco Cajun
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	867	958
ACCOUNTS PAYABLE	$ 5	$ 39

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_DueFromRelatedPartiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant