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Retirement Plans - Schedule of Defined Benefit Pension Plan by Major Asset Categories (Details) - USD ($) $ in Millions | Oct. 03, 2025 | Sep. 27, 2024 | Sep. 29, 2023 | Sep. 30, 2022
--- | --- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | $ 305 | $ 315 | $ 281 | $ 271
Carrying Value |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 242 | 134 |  |
Quoted Prices in Active Markets (Level 1) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 59 | 134 |  |
Significant Other Observable Inputs (Level 2) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 183 |  |  |
Investments measured at NAV |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 63 | 181 |  |
Cash and cash equivalents | Carrying Value |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 9 | 6 |  |
Cash and cash equivalents | Quoted Prices in Active Markets (Level 1) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 9 | 6 |  |
Cash and cash equivalents | Significant Other Observable Inputs (Level 2) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 0 |  |  |
Fixed income funds | Carrying Value |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 233 | 128 |  |
Fixed income funds | Quoted Prices in Active Markets (Level 1) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 50 | 128 |  |
Fixed income funds | Significant Other Observable Inputs (Level 2) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 183 |  |  |
Common collective funds - debt | Investments measured at NAV |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | 0 | 87 |  |
Diversified and equity funds | Investments measured at NAV |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, amount | $ 63 | $ 94 |  |

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