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Retirement Plans (Fair Values of Qualified Plan's Assets) (Details) - USD ($) $ in Thousands | Sep. 29, 2024 | Oct. 01, 2023
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 302,439 | $ 275,143
Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 2,933 | 3,266
Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 40,193 | 30,879
Liability-hedging assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 200,675 | 184,085
Alternative Investments Member |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 32,100 | 28,378
Real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 26,538 | 28,535
Fair Value Measured at Net Asset Value Per Share |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 184,920 | 165,445
Fair Value Measured at Net Asset Value Per Share | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Fair Value Measured at Net Asset Value Per Share | Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 40,193 | 30,879
Fair Value Measured at Net Asset Value Per Share | Liability-hedging assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 86,089 | 77,653
Fair Value Measured at Net Asset Value Per Share | Alternative Investments Member |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 32,100 | 28,378
Fair Value Measured at Net Asset Value Per Share | Real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 26,538 | 28,535
Quoted Prices in Active Markets for Identical (Level 1) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Quoted Prices in Active Markets for Identical (Level 1) | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Quoted Prices in Active Markets for Identical (Level 1) | Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Quoted Prices in Active Markets for Identical (Level 1) | Liability-hedging assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Quoted Prices in Active Markets for Identical (Level 1) | Alternative Investments Member |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Quoted Prices in Active Markets for Identical (Level 1) | Real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 117,519 | 109,698
Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 2,933 | 3,266
Significant Other Observable Inputs (Level 2) | Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Other Observable Inputs (Level 2) | Liability-hedging assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 114,586 | 106,432
Significant Other Observable Inputs (Level 2) | Alternative Investments Member |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Other Observable Inputs (Level 2) | Real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Liability-hedging assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Alternative Investments Member |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Fair value of plan assets | $ 0 | $ 0

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