Fair Value Accounting - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) - Measured on a Recurring Basis - Level 3 $ in Thousands	Jun. 30, 2020 USD ($) $ / MW	Dec. 31, 2019 USD ($) $ / MW
FAIR VALUE
ASSETS | $	$ 10,006	$ 6,822
LIABILITIES | $	1,966	1,044
CLECO POWER
FAIR VALUE
ASSETS | $	8,670	6,311
LIABILITIES | $	$ 1,159	$ 586
Minimum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(3.46)	(2.57)
Minimum | CLECO POWER
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(1.93)	(2.04)
Maximum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	3.97	2.86
Maximum | CLECO POWER
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	3.97	2.86