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Defined Benefit Pension Plans - Narrative (Details) |  | 1 Months Ended | 12 Months Ended |
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Sep. 26, 2021 plan | Sep. 25, 2022 USD ($) plan | Sep. 24, 2023 USD ($) plan | Sep. 25, 2022 USD ($) plan | Sep. 26, 2021 plan | Nov. 30, 2023 USD ($) participant
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Number of defined benefit plans | plan | 7 |  | 1 |  | 7 |
Defined benefit plans, number of plans frozen | plan | 2 |  |  | 4 |  |
Defined benefit plan, number of frozen plans merged | plan |  |  |  | 6 |  |
Number of fully-funded defined benefit plans | plan |  | 1 |  | 1 |  |
Amortization of prior service cost (credit) expected to be recognized during the next fiscal year |  |  | $ 800,000 |  |  |
Subsequent Event |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Voluntary lump sum payment of future pension benefits |  |  |  |  |  | $ 22,600,000
Number of participants who have elected voluntary settlement | participant |  |  |  |  |  | 522
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Decrease to accumulated other comprehensive income due to plan enhancements |  |  |  | $ 6,100,000 |  |
Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Non-cash curtailment gain |  |  | 0 | 1,027,000 |  |
Increase to net pension liability due to plan enhancements |  |  | 0 | 6,077,000 |  |
Decrease in plan liabilities due to purchase of annuities |  | $ 85,600,000 |  |  |  |
Increase in defined benefit plan assets |  | 81,400,000 | $ 0 | $ 81,377,000 |  |
Settlement income charge |  | 4,200,000 |  |  |  |
Assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets |  |  | 5.00% | 5.00% | 5.90% |
Expected future employer contributions, next fiscal year |  |  | $ 0 |  |  |
Defined benefit plan accrued liability |  | 252,000 | 10,844,000 | $ 252,000 |  |
Pension Plan | U.S. Small Cap Value Equity Common/Collective Fund |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Investment in equity securities measured at fair value, recognized in net income |  | 2,200,000 | 2,300,000 | 2,200,000 |  |
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Investment in equity securities measured at fair value, recognized in net income |  | 16,700,000 | $ 11,700,000 | 16,700,000 |  |
Maximum percentage of equity investment redeemable |  |  | 0.90 |  |  |
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Minimum |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Notice for redemption of equity investment |  |  | 90 days |  |  |
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds | Maximum |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Notice for redemption of equity investment |  |  | 120 days |  |  |
Pension Plan | Global Equity Long/Short Common/Collective Hedge Fund-of-funds 2 |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Investment in equity securities measured at fair value, recognized in net income |  | 15,900,000 | $ 12,700,000 | 15,900,000 |  |
Maximum percentage of equity investment redeemable |  |  | 0.50 |  |  |
Other Pension Plan |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |
Defined benefit plan accrued liability |  | $ 1,000,000 | $ 600,000 | $ 1,000,000 |  |

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