Revenue - Schedule of Reportable Segment Revenues, Disaggregated by Revenue (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | $ 717.6 | $ 708.3 | $ 2,035.3 | $ 1,970.0 |
| Operating Segments | Landscape Maintenance | ||||
| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | 514.5 | 502.9 | 1,215.5 | 1,200.2 |
| Operating Segments | Snow Removal | ||||
| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | 3.4 | 5.9 | 293.4 | 210.7 |
| Operating Segments | Maintenance Services | ||||
| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | 517.9 | 508.8 | 1,508.9 | 1,410.9 |
| Operating Segments | Development Services | ||||
| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | 201.9 | 201.3 | 530.7 | 565.0 |
| Eliminations | ||||
| Disaggregation Of Revenue [Line Items] | ||||
| Net service revenues | $ (2.2) | $ (1.8) | $ (4.3) | $ (5.9) |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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