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Summary of Significant Accounting Policies (Schedule of Product Warranty Liability) (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |
Balance at beginning of year | $ 23.6 | $ 15.7 | $ 10.7
Product Warranty Expense | 14.9 | 13.0 | 14.8
Warranty payments | (12.9) | (5.1) | (9.8)
Balance at end of year | $ 25.6 | $ 23.6 | $ 15.7

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date, whether due within or after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers. + References No definition available. + Details
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- Definition Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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