Affiliate Transactions - Summary of Balances Payable To or Due From Affiliates (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
ACCOUNTS PAYABLE	$ 33,780	$ 33,780
CLECO POWER
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	12,037	14,481
ACCOUNTS PAYABLE	10,486	14,123
CLECO POWER \| Cleco Holdings
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	10,420	10,351
ACCOUNTS PAYABLE	170	194
CLECO POWER \| Support Group
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	1,082	3,172
ACCOUNTS PAYABLE	10,197	13,890
CLECO POWER \| Cleco Cajun
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	535	958
ACCOUNTS PAYABLE	$ 119	$ 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
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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
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Name:	us-gaap_DueFromRelatedPartiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant