Fair Value Accounting, Fair Values of Derivative Instruments (Details) (Forward Starting Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Fair values of derivative instruments [Abstract]
Energy risk management liability, net, current	$ 0.4
Cleco Power [Member]
Fair values of derivative instruments [Abstract]
Energy risk management liability, net, current	$ 0.4

Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

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+ Details