Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

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Fixed interest rate related to the interest rate derivative.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Date the derivative contract matures, in CCYY-MM-DD format.

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Nominal or face amount used to calculate payment on derivative.

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The amount of net gain (loss) reclassified into earnings when interest rate cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period.

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Derivative Financial Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Derivative, Cap Interest Rate		0.75%
Derivative, Fixed Interest Rate			2.341%
Derivative, Notional Amount			$ 150.0
Derivative, Maturity Date		Sep. 30, 2021
Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$ 0.0	$ 0.0	$ 2.4
Secured Debt [Member]
Derivative [Line Items]
Derivative, Amount of Hedged Item		$ 150.0
Cash Flow Hedging [Member] \| Secured Debt [Member]
Derivative [Line Items]
Debt Instrument, Interest Rate, Effective Percentage		4.841%
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Liability, Noncurrent	$ 0.2	$ 0.3