Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

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The rate of interest that was being paid on the original debt issue that is being converted in the noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt, Long-term Debt (Details) - USD ($) $ in Millions	Apr. 28, 2017	Mar. 01, 2017	May 31, 2016	Mar. 31, 2008
Cleco Katrina Rita's storm recovery bonds, 5.61, due 2023 [Member]
Debt Instrument [Line Items]
Debt amount				$ 180.6
Cleco Katrina Rita's storm recovery bonds, 5.61, due 2023 [Member]
Debt Instrument [Line Items]
Debt amount				$ 113.0
Interest rate, stated percentage (in hundredths)				4.41%
Repayment of Senior Notes through cash		$ 1.1
Interest Expense, Debt		$ 0.1
Cleco Holdings [Member] \| Cleco Holdings' senior notes, 4.973%, due 2046 [Member]
Debt Instrument [Line Items]
Debt amount			$ 350.0
Interest rate, stated percentage (in hundredths)			4.973%
Interest rate on original debt (in hundredths)	4.973%
Interest rate on converted debt (in hundredths)	4.973%
Cleco Holdings [Member] \| Cleco Corporate Holdings, Acquisition Loan Facility [Member]
Debt Instrument [Line Items]
Debt amount			$ 1,350.0
Cleco Holdings [Member] \| Cleco Holdings' senior notes, 3.743%, due 2026 [Member]
Debt Instrument [Line Items]
Debt amount			$ 535.0
Interest rate, stated percentage (in hundredths)			3.743%
Interest rate on original debt (in hundredths)	3.743%
Interest rate on converted debt (in hundredths)	3.743%