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Pension and Other Post Retirement Benefit Plans - Schedule of Fair Value of Pension Plan Assets (Details) - Pension Plan - USD ($) $ in Thousands | Sep. 26, 2025 | Sep. 27, 2024 | Sep. 29, 2023
--- | --- | --- | ---
U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | $ 276,588 | $ 293,828 | $ 277,583
U.S. Plans | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 65,358 | 73,563 |
U.S. Plans | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 211,230 | 220,265 |
U.S. Plans | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 2,725 | 2,845 |
U.S. Plans | Equities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 2,725 | 2,845 |
U.S. Plans | Equities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Equities | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Equities | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Domestic bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 198,776 | 217,725 |
U.S. Plans | Domestic bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 372 | 10,081 |
U.S. Plans | Domestic bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 198,404 | 207,644 |
U.S. Plans | Domestic bonds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Domestic bonds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Overseas bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 12,826 | 12,621 |
U.S. Plans | Overseas bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Overseas bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 12,826 | 12,621 |
U.S. Plans | Overseas bonds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Overseas bonds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Cash and equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 12,169 | 10,723 |
U.S. Plans | Cash and equivalents | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 12,169 | 10,723 |
U.S. Plans | Cash and equivalents | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Cash and equivalents | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Cash and equivalents | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 50,092 | 49,914 |
U.S. Plans | Mutual funds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 50,092 | 49,914 |
U.S. Plans | Mutual funds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Mutual funds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
U.S. Plans | Mutual funds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 1,399,048 | 1,440,593 | 1,243,025
Non-U.S. Plans | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 13,473 | 17,161 |
Non-U.S. Plans | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 938,143 | 1,003,714 |
Non-U.S. Plans | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 179,883 | 186,587 |
Non-U.S. Plans | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 267,549 | 233,131 |
Non-U.S. Plans | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 68,020 | 63,612 |
Non-U.S. Plans | Equities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Equities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 67,365 | 61,722 |
Non-U.S. Plans | Equities | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Equities | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 655 | 1,890 |
Non-U.S. Plans | Overseas equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 127,058 | 152,900 |
Non-U.S. Plans | Overseas equities | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Overseas equities | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 64,253 | 62,988 |
Non-U.S. Plans | Overseas equities | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Overseas equities | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 62,805 | 89,912 |
Non-U.S. Plans | Domestic bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 40,342 | 43,563 |
Non-U.S. Plans | Domestic bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Domestic bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 40,342 | 43,563 |
Non-U.S. Plans | Domestic bonds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Domestic bonds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Overseas bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 757,126 | 780,097 |
Non-U.S. Plans | Overseas bonds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Overseas bonds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 610,116 | 697,585 |
Non-U.S. Plans | Overseas bonds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Overseas bonds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 147,010 | 82,512 |
Non-U.S. Plans | Cash and equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 13,473 | 17,161 |
Non-U.S. Plans | Cash and equivalents | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 13,473 | 17,161 |
Non-U.S. Plans | Cash and equivalents | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Cash and equivalents | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Cash and equivalents | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Real estate |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 74,924 | 93,621 |
Non-U.S. Plans | Real estate | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Real estate | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 8,338 | 12,101 |
Non-U.S. Plans | Real estate | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 28,861 | 42,479 | 84,755
Non-U.S. Plans | Real estate | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 37,725 | 39,041 |
Non-U.S. Plans | Insurance contracts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 57,132 | 62,337 |
Non-U.S. Plans | Insurance contracts | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Insurance contracts | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Insurance contracts | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 57,132 | 62,337 | 87,160
Non-U.S. Plans | Insurance contracts | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Hedge funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 113,244 | 101,547 |
Non-U.S. Plans | Hedge funds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year |  | 0 |
Non-U.S. Plans | Hedge funds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Hedge funds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 93,890 | 81,771 | $ 78,617
Non-U.S. Plans | Hedge funds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 19,354 | 19,776 |
Non-U.S. Plans | Mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 147,729 | 125,755 |
Non-U.S. Plans | Mutual funds | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Mutual funds | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 147,729 | 125,755 |
Non-U.S. Plans | Mutual funds | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | 0 | 0 |
Non-U.S. Plans | Mutual funds | Investments measured at Net Asset Value |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Fair value of plan assets at the end of the year | $ 0 | $ 0 |

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