Revenue - Performance Obligations and Contract Estimates (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||
| Standard assurance warranty, period | 1 year | |
| Remaining performance obligation, amount | $ 1,300.0 | |
| Changes in contract estimates related to projects in progress | 8.8 | $ 7.8 |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-04-01 | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | ||
| Remaining performance obligation, amount | $ 831.0 | |
| Remaining performance obligation, expected timing of satisfaction, period | 12 months | |