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Commitments and Contingencies (Details) $ in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 CAD ($)	Sep. 30, 2019 USD ($)
Loss Contingency, Damages Sought, Value			$ 10.0
Document Period End Date	Sep. 30, 2021
Product Warranty Expense	$ 3.5	$ 2.6		$ 3.9
Income Tax Examination, Penalties and Interest Expense	$ 22.2

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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