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Revenue - Performance Obligations and Contract Estimates (Details) - USD ($) $ in Millions | 9 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |
Standard assurance warranty, period | 1 year |
Remaining performance obligation, amount | $ 1,400.0 |
Changes in contract estimates related to projects in progress | 15.1 | $ 14.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-07-01 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |
Remaining performance obligation, amount | $ 913.0 |
Remaining performance obligation, expected timing of satisfaction, period | 12 months |

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- Definition Standard Assurance Warranty, Period + References No definition available. + Details
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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(1) -SubTopic 10 -Topic 606 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 + Details
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