Retirement Plans (Fair Values of Qualified Plan's Assets) (Details) - USD ($) $ in Thousands	Oct. 01, 2023	Oct. 02, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 275,143	$ 303,951
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,266	2,267
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		33,659
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30,879	32,807
Liability-hedging assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	184,085	193,426
High yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,970
Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,378	12,061
Real assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,535	22,761
Quoted Prices in Active Markets for Identical (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	77,324
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) | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		33,659
Quoted Prices in Active Markets for Identical (Level 1) | International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	16,557
Quoted Prices in Active Markets for Identical (Level 1) | Liability-hedging assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	20,138
Quoted Prices in Active Markets for Identical (Level 1) | High yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		6,970
Quoted Prices in Active Markets for Identical (Level 1) | Alternative investments
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	109,698	175,555
Significant Other Observable Inputs (Level 2) | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,266	2,267
Significant Other Observable Inputs (Level 2) | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Significant Other Observable Inputs (Level 2) | International equities
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	106,432	173,288
Significant Other Observable Inputs (Level 2) | High yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Significant Other Observable Inputs (Level 2) | Alternative investments
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) | Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | International equities
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) | High yield
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Significant Unobservable Inputs (Level 3) | Alternative investments
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