Accrued Expenses and Current Portion of Other Long-Term Liabilities (Narrative) (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jun. 27, 2026 |
Jun. 28, 2025 |
Jun. 27, 2026 |
Jun. 28, 2025 |
Sep. 27, 2025 |
|
| Accrued Expenses and Current Portion of Other Long-Term Liabilities [Abstract] | |||||
| Workers' compensation per occurrence covered under insurance cost | $ 1,000,000.0 | $ 1,000,000.0 | |||
| Medical care benefits per person covered under insurance cost | 650,000 | 650,000 | |||
| Self insurance liabilities | 36,000,000.0 | 36,000,000.0 | $ 38,300,000 | ||
| Self insurance liabilities, current | 16,500,000 | 16,500,000 | 17,800,000 | ||
| Self insurance liabilities, noncurrent | 19,500,000 | 19,500,000 | 20,500,000 | ||
| Receivable for expected self-insurance recoveries from excess cost insurance | 3,300,000 | 3,300,000 | $ 3,300,000 | ||
| Employee insurance expense | $ 13,700,000 | $ 12,800,000 | $ 37,000,000.0 | $ 36,000,000.0 | |