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Intangible Assets and Goodwill (Tables) | 3 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | The following table summarizes the carrying amounts and related accumulated amortization for intangible assets as of:
| December 31, 2025 |  | September 30, 2025
| Cost |  | Accumulated Amortization |  | Cost |  | Accumulated Amortization
Finite-lived assets: |  |  |  |  |  |  |
Customer relationships | $ | 1,245.7 |  |  | $ | (439.3) |  |  | $ | 1,239.7 |  |  | $ | (419.1) |
Technology, including patents | 189.3 |  |  | (116.7) |  |  | 189.0 |  |  | (113.4) |
Software | 67.5 |  |  | (40.9) |  |  | 66.5 |  |  | (39.2) |
Trade names | 54.0 |  |  | (18.2) |  |  | 53.9 |  |  | (16.7) |
| 1,556.5 |  |  | (615.1) |  |  | 1,549.1 |  |  | (588.4) |
Indefinite-lived assets: |  |  |  |  |  |  |
Trade names | 175.5 |  |  | — |  |  | 175.3 |  |  | — |
Total | $ | 1,732.0 |  |  | $ | (615.1) |  |  | $ | 1,724.4 |  |  | $ | (588.4) |
Schedule of Goodwill | The following table summarizes the changes in the Company’s goodwill, by reportable operating segment, for the three months ended December 31, 2025:
| Advanced Process Solutions |  | Molding Technology Solutions |  |  |  | Total
Balance as of September 30, 2025 | $ | 1,458.8 |  |  | $ | 142.6 |  |  |  |  | $ | 1,601.4 |
Foreign currency adjustments | 4.6 |  |  | 1.5 |  |  |  |  | 6.1 |
Balance as of December 31, 2025 | $ | 1,463.4 |  |  | $ | 144.1 |  |  |  |  | $ | 1,607.5 |

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