Accounts Receivable, net |
6 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Receivables [Abstract] | |
| Accounts Receivable, net | 4. Accounts Receivable, net Accounts receivable of $432.0 and $393.1, is net of an allowance for doubtful accounts of $9.8 as of March 31, 2026 and September 30, 2025 and includes amounts of retention on incomplete projects to be completed within one year of $54.3 and $58.3 as of March 31, 2026 and September 30, 2025, respectively. |