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Commitments and Contingencies (Details) $ in Millions, $ in Millions | 12 Months Ended
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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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- Definition The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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