Affiliate Transactions (Details) - CLECO POWER - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	$ 1,372	$ 1,355
ACCOUNTS PAYABLE	10,574	8,697
Cleco Holdings
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	97	743
ACCOUNTS PAYABLE	635	113
Support Group
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	1,275	608
ACCOUNTS PAYABLE	9,939	8,582
Other
Related Party Transaction [Line Items]
ACCOUNTS RECEIVABLE	0	4
ACCOUNTS PAYABLE	$ 0	$ 2

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).

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