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Retirement Plans (Fair Values of Qualified Plan's Assets) (Details) - USD ($)
$ in Thousands
Sep. 28, 2025
Sep. 29, 2024
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 290,569 $ 302,439
Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,793 2,933
Global equity    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 35,961 40,193
Liability-hedging assets    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 190,685 200,675
Alternative Investments Member    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 31,629 32,100
Real assets    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 26,501 26,538
Fair Value Measured at Net Asset Value Per Share    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 181,202 184,920
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 35,961 40,193
Fair Value Measured at Net Asset Value Per Share | Liability-hedging assets    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 87,111 86,089
Fair Value Measured at Net Asset Value Per Share | Alternative Investments Member    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 31,629 32,100
Fair Value Measured at Net Asset Value Per Share | Real assets    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 26,501 26,538
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 109,367 117,519
Significant Other Observable Inputs (Level 2) | Cash and cash equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,793 2,933
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 103,574 114,586
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