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Pension and Other Post Retirement Benefit Plans (Tables) | 12 Months Ended
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Sep. 26, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Change In Plans' Combined Net Benefit Obligations | The following table sets forth the changes in the plans’ combined net benefit obligation (segregated between plans existing within and outside the U.S.) for the years ended September 26, 2025 and September 27, 2024 (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Net benefit obligation at the beginning of the year | $ | 296,746 |  |  | $ | 281,852 |  |  | $ | 1,519,871 |  |  | $ | 1,300,261 |
Service cost | 136 |  |  | 119 |  |  | 9,855 |  |  | 8,922 |
Interest cost | 13,621 |  |  | 15,574 |  |  | 74,598 |  |  | 71,270 |
Participants’ contributions | — |  |  | — |  |  | 9 |  |  | 91 |
Actuarial (gains) losses (1) | (2,003) |  |  | 25,571 |  |  | (120,367) |  |  | 65,940 |
Benefits paid | (27,194) |  |  | (26,370) |  |  | (93,539) |  |  | (77,446) |
Curtailments/settlements/plan amendments (2) | — |  |  | — |  |  | (1,214) |  |  | (32,496) |
Effect of exchange rate changes and other, net | — |  |  | — |  |  | 46,584 |  |  | 183,329 |
Net benefit obligation at the end of the year | $ | 281,306 |  |  | $ | 296,746 |  |  | $ | 1,435,797 |  |  | $ | 1,519,871 |
(1)Actuarial (gains) losses primarily driven by change in discount rates. (2)In fiscal 2024, we completed a termination and buy-out of the primary PA Consulting pension plan which relieves the Company of any future obligations with no impact to net income.
Schedule of Change in Combined Fair Value of the Plans' Assets | The following table sets forth the changes in the combined Fair Value of the plans’ assets (segregated between plans existing within and outside the U.S.) for the years ended September 26, 2025 and September 27, 2024 (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Fair value of plan assets at the beginning of the year | $ | 293,828 |  |  | $ | 277,583 |  |  | $ | 1,440,593 |  |  | $ | 1,243,025 |
Actual returns (losses) on plan assets | 9,861 |  |  | 42,523 |  |  | (38,909) |  |  | 111,948 |
Employer contributions | 93 |  |  | 92 |  |  | 46,426 |  |  | 23,787 |
Participants’ contributions | — |  |  | — |  |  | 9 |  |  | 91 |
Gross benefits paid | (27,194) |  |  | (26,370) |  |  | (93,539) |  |  | (77,447) |
Curtailments/settlements/plan amendments (1) | — |  |  | — |  |  | (1,214) |  |  | (32,246) |
Effect of exchange rate changes and other, net | — |  |  | — |  |  | 45,682 |  |  | 171,435 |
Fair value of plan assets at the end of the year | $ | 276,588 |  |  | $ | 293,828 |  |  | $ | 1,399,048 |  |  | $ | 1,440,593 |
(1) In fiscal 2024, we completed a termination and buy-out of the primary PA Consulting pension plan which relieves the Company of any future obligations with no impact to net income.
Schedule of Reconciliation of Combined Funded Status of Plans and Recognized in Consolidated Balance Sheet | The following table reconciles the combined funded statuses of the plans recognized in the accompanying Consolidated Balance Sheets at September 26, 2025 and September 27, 2024 (segregated between plans existing within and outside the U.S.) (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Net benefit obligation at the end of the year | $ | 281,306 |  |  | $ | 296,746 |  |  | $ | 1,435,797 |  |  | $ | 1,519,871 |
Fair value of plan assets at the end of the year | 276,588 |  |  | 293,828 |  |  | 1,399,048 |  |  | 1,440,593 |
Underfunded amount recognized at the end of the year | $ | 4,718 |  |  | $ | 2,918 |  |  | $ | 36,749 |  |  | $ | 79,278 |
Schedule of Accumulated and Projected Benefit Obligations | The following table presents the accumulated benefit obligation at September 26, 2025 and September 27, 2024 (segregated between plans existing within and outside the U.S.) (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Accumulated benefit obligation at the end of the year | $ | 280,165 |  |  | $ | 295,691 |  |  | $ | 1,415,467 |  |  | $ | 1,499,884 |
Schedule of Amount Recognized in Accompanying Balance Sheets | The following table presents the amounts recognized in the accompanying Consolidated Balance Sheets at September 26, 2025 and September 27, 2024 (segregated between plans existing within and outside the U.S.) (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Prepaid benefit cost included in noncurrent assets | $ | — |  |  | $ | — |  |  | $ | 65,792 |  |  | $ | 62,056 |
Accrued benefit cost included in current liabilities | 90 |  |  | 90 |  |  | 7,057 |  |  | 6,833 |
Accrued benefit cost included in noncurrent liabilities | 4,628 |  |  | 2,828 |  |  | 95,484 |  |  | 134,501 |
Net amount recognized at the end of the year | $ | 4,718 |  |  | $ | 2,918 |  |  | $ | 36,749 |  |  | $ | 79,278 |
Schedule of Pension Plans Recorded In Accumulated Other Comprehensive Loss Not Yet Recognized As Component of Net Periodic Pension Cost | The following table presents certain amounts relating to our plans recorded in Accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit cost at September 26, 2025 and September 27, 2024 (segregated between U.S. and non-U.S. plans) (in thousands):
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Net actuarial losses | $ | 40,413 |  |  | $ | 37,552 |  |  | $ | 310,464 |  |  | $ | 310,884 |
Prior service cost | — |  |  | 47 |  |  | 22,033 |  |  | 22,454 |
Total | $ | 40,413 |  |  | $ | 37,599 |  |  | $ | 332,497 |  |  | $ | 333,338 |
Schedule of Accumulated Comprehensive Income Amortized Against Earnings In Next Year | The following table presents the amount of accumulated comprehensive loss that will be amortized against earnings as part of our net periodic benefit cost in fiscal 2026 based on 2025 exchange rates (segregated between U.S. and non-U.S. plans) (in thousands):
| U.S. Plans |  | Non-U.S. Plans
Unrecognized net actuarial losses | $ | 1,981 |  |  | $ | 10,236 |
Unrecognized prior service cost | — |  |  | 1,449 |
Accumulated comprehensive losses to be recorded against earnings | $ | 1,981 |  |  | $ | 11,685 |
Schedule of Weighted Average Measurement Of Assets And Liabilities | The plans’ weighted average asset allocations at September 26, 2025 and September 27, 2024 (the measurement dates used in valuing the plans’ assets and liabilities) were as follows:
| U.S. Plans |  | Non-U.S. Plans
| September 26, 2025 |  | September 27, 2024 |  | September 26, 2025 |  | September 27, 2024
Equity securities | 1 | % |  | 1 | % |  | 14 | % |  | 15 | %
Debt securities | 77 | % |  | 79 | % |  | 57 | % |  | 57 | %
Real estate investments | — | % |  | — | % |  | 5 | % |  | 6 | %
Mutual Funds | 18 | % |  | 17 | % |  | 11 | % |  | 9 | %
Other | 4 | % |  | 3 | % |  | 13 | % |  | 13 | %
Schedule of Anticipated Cash Contributions | The following table presents the amount of cash contributions we anticipate making into the plans during fiscal 2026 (in thousands):
| U.S. Plans |  | Non-U.S. Plans
Anticipated cash contributions | $ | — |  |  | $ | 13,850 |
Schedule of Expected Payments to Participants in Pension Plan | The following table presents the total benefit payments expected to be paid to plan participants during each of the next five fiscal years, and in total for the five years thereafter (in thousands):
| U.S. Plans |  | Non-U.S. Plans
2026 | $ | 29,179 |  |  | $ | 89,460 |
2027 | 26,891 |  |  | 93,180 |
2028 | 26,638 |  |  | 93,924 |
2029 | 25,400 |  |  | 95,379 |
2030 | 24,124 |  |  | 94,874 |
For the periods 2031 through 2035 | 106,362 |  |  | 490,669 |
Schedule of Contribution to Multiemployer Pension Plans | The following table presents the Company’s contributions to these multiemployer plans for the years ended September 26, 2025, September 27, 2024 and September 29, 2023 (in thousands):
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Europe | $ | 2,088 |  |  | $ | 1,769 |  |  | $ | 1,635 |
United States | 156 |  |  | 156 |  |  | 154 |
Contributions to multiemployer pension plans | $ | 2,244 |  |  | $ | 1,925 |  |  | $ | 1,789 |
U.S. Plans |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Significant Actuarial Assumptions In Determining Funded Status Plans | The following table presents the significant actuarial assumptions used in determining the funded statuses and the following year's benefit cost of the Company’s U.S. plans for the years ended September 26, 2025, September 27, 2024 and September 29, 2023:
| For the Years Ended
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Discount rates | 4.7% to 5.2% |  | 4.6% to 4.9% |  | 5.8% to 5.9%
Rates of compensation increases | 3.5% |  | 3.5% |  | 3.5%
Expected long-term rates of return on assets | 5.6% to 6.3% |  | 5.4% to 6.2% |  | 4.8% to 7.0%
Schedule of Pension Plans Recognized In Accumulated Other Comprehensive Loss | The following table presents certain amounts relating to our U.S. plans recognized in Accumulated other comprehensive loss at September 26, 2025, September 27, 2024 and September 29, 2023 (in thousands):
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Arising during the period: |  |  |  |  |
Net actuarial losses (gains) | $ | 3,965 |  |  | $ | 1,576 |  |  | $ | (4,032) |
Total | 3,965 |  |  | 1,576 |  |  | (4,032)
Reclassification adjustments: |  |  |  |  |
Net actuarial (losses) gains | (1,104) |  |  | 1,031 |  |  | 1,335 |
Prior service benefit | (47) |  |  | (321) |  |  | (324) |
Total | (1,151) |  |  | 710 |  |  | 1,011 |
Total | $ | 2,814 |  |  | $ | 2,286 |  |  | $ | (3,021) |
Schedule of Fair Value of Pension Plan Assets | The following table presents the fair value of the Company’s Domestic U.S. plan assets at September 26, 2025, segregated by level of fair value measurement inputs within the Fair Value hierarchy promulgated by U.S. GAAP (in thousands):
| September 26, 2025
| Fair Value, Determined Using Fair Value Measurement Inputs
| Level 1 |  | Level 2 |  | Level 3 |  | Investments measured at Net Asset Value |  | Total
Equities | $ | 2,725 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,725 |
Domestic bonds | 372 |  |  | 198,404 |  |  | — |  |  | — |  |  | 198,776 |
Overseas bonds | — |  |  | 12,826 |  |  | — |  |  | — |  |  | 12,826 |
Cash and equivalents | 12,169 |  |  | — |  |  | — |  |  | — |  |  | 12,169 |
Mutual funds | 50,092 |  |  | — |  |  | — |  |  | — |  |  | 50,092 |
Total | $ | 65,358 |  |  | $ | 211,230 |  |  | $ | — |  |  | $ | — |  |  | $ | 276,588 |
The following table presents the fair value of the Company’s U.S. plan assets at September 27, 2024, segregated by level of fair value measurement inputs within the Fair Value hierarchy promulgated by U.S. GAAP (in thousands):
| September 27, 2024
| Fair Value, Determined Using Fair Value Measurement Inputs
| Level 1 |  | Level 2 |  | Level 3 |  | Investments measured at Net Asset Value |  | Total
Equities | $ | 2,845 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 2,845 |
Domestic bonds | 10,081 |  |  | 207,644 |  |  | — |  |  | — |  |  | 217,725 |
Overseas bonds | — |  |  | 12,621 |  |  | — |  |  | — |  |  | 12,621 |
Cash and equivalents | 10,723 |  |  | — |  |  | — |  |  | — |  |  | 10,723 |
Mutual funds | 49,914 |  |  | — |  |  | — |  |  | — |  |  | 49,914 |
Total | $ | 73,563 |  |  | $ | 220,265 |  |  | $ | — |  |  | $ | — |  |  | $ | 293,828 |
Schedule of Net Benefit Costs | The following table presents the components of net periodic benefit cost for the Company’s U.S. plans recognized in the accompanying Consolidated Statements of Earnings for the years ended September 26, 2025, September 27, 2024 and September 29, 2023 (in thousands):
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Service cost | $ | 136 |  |  | $ | 119 |  |  | $ | 140 |
Interest cost | 13,621 |  |  | 15,574 |  |  | 15,629 |
Expected return on plan assets | (17,243) |  |  | (19,058) |  |  | (19,496) |
Actuarial losses (gains) | 1,482 |  |  | (1,384) |  |  | (1,770) |
Prior service cost | 63 |  |  | 431 |  |  | 430 |
Total net periodic pension income recognized | $ | (1,941) |  |  | $ | (4,318) |  |  | $ | (5,067) |
Non-U.S. Plans |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |
Schedule of Significant Actuarial Assumptions In Determining Funded Status Plans | The following table presents the significant actuarial assumptions used in determining the funded statuses and the following year's benefit cost of the Company’s non-U.S. plans for the years ended September 26, 2025, September 27, 2024 and September 29, 2023:
| For the Years Ended
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Discount rates | 3.2% to 6.0% |  | 3.4% to 7.0% |  | 3.8% to 6.9%
Rates of compensation increases | 3.7% to 9.0% |  | 2.6% to 9.0% |  | 2.8% to 9.0%
Expected long-term rates of return on assets | 4.0% to 8.2% |  | 4.6% to 7.8% |  | 5.3% to 7.6%
Schedule of Pension Plans Recognized In Accumulated Other Comprehensive Loss | The following table presents certain amounts relating to our non-U.S. plans recognized in Accumulated other comprehensive loss at September 26, 2025, September 27, 2024 and September 29, 2023 (in thousands):
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Arising during the period: |  |  |  |  |
Net actuarial losses | $ | 8,150 |  |  | $ | 49,685 |  |  | $ | 27,188 |
Total | 8,150 |  |  | 49,685 |  |  | 27,188 |
Reclassification adjustments: |  |  |  |  |
Net actuarial losses | (7,785) |  |  | (5,601) |  |  | (4,802) |
Prior service benefit | (1,206) |  |  | (1,125) |  |  | (1,068) |
Total | (8,991) |  |  | (6,726) |  |  | (5,870) |
Total | $ | (841) |  |  | $ | 42,959 |  |  | $ | 21,318 |
Schedule of Fair Value of Pension Plan Assets | The following table presents the fair value of the Company’s non-U.S. plan assets at September 26, 2025, segregated by level of fair value measurement inputs within the Fair Value hierarchy promulgated by U.S. GAAP (in thousands):
| September 26, 2025
| Fair Value, Determined Using Fair Value Measurement Inputs
| Level 1 |  | Level 2 |  | Level 3 |  | Investments measured at Net Asset Value |  | Total
Domestic equities | $ | — |  |  | $ | 67,365 |  |  | $ | — |  |  | $ | 655 |  |  | $ | 68,020 |
Overseas equities | — |  |  | 64,253 |  |  | — |  |  | 62,805 |  |  | 127,058 |
Domestic bonds | — |  |  | 40,342 |  |  | — |  |  | — |  |  | 40,342 |
Overseas bonds | — |  |  | 610,116 |  |  | — |  |  | 147,010 |  |  | 757,126 |
Cash and equivalents | 13,473 |  |  | — |  |  | — |  |  | — |  |  | 13,473 |
Real estate | — |  |  | 8,338 |  |  | 28,861 |  |  | 37,725 |  |  | 74,924 |
Insurance contracts | — |  |  | — |  |  | 57,132 |  |  | — |  |  | 57,132 |
Hedge funds |  |  | — |  |  | 93,890 |  |  | 19,354 |  |  | 113,244 |
Mutual funds | — |  |  | 147,729 |  |  | — |  |  | — |  |  | 147,729 |
Total | $ | 13,473 |  |  | $ | 938,143 |  |  | $ | 179,883 |  |  | $ | 267,549 |  |  | $ | 1,399,048 |
The following table presents the fair value of the Company’s non-U.S. plan assets at September 27, 2024, segregated by level of fair value measurement inputs within the Fair Value hierarchy promulgated by U.S. GAAP (in thousands):
| September 27, 2024
| Fair Value, Determined Using Fair Value Measurement Inputs
| Level 1 |  | Level 2 |  | Level 3 |  | Investments measured at Net Asset Value |  | Total
Domestic equities | $ | — |  |  | $ | 61,722 |  |  | $ | — |  |  | $ | 1,890 |  |  | $ | 63,612 |
Overseas equities | — |  |  | 62,988 |  |  | — |  |  | 89,912 |  |  | 152,900 |
Domestic bonds | — |  |  | 43,563 |  |  | — |  |  | — |  |  | 43,563 |
Overseas bonds | — |  |  | 697,585 |  |  | — |  |  | 82,512 |  |  | 780,097 |
Cash and equivalents | 17,161 |  |  | — |  |  | — |  |  | — |  |  | 17,161 |
Real estate | — |  |  | 12,101 |  |  | 42,479 |  |  | 39,041 |  |  | 93,621 |
Insurance contracts | — |  |  | — |  |  | 62,337 |  |  | — |  |  | 62,337 |
Hedge funds | — |  |  | — |  |  | 81,771 |  |  | 19,776 |  |  | 101,547 |
Mutual funds | — |  |  | 125,755 |  |  | — |  |  | — |  |  | 125,755 |
Total | $ | 17,161 |  |  | $ | 1,003,714 |  |  | $ | 186,587 |  |  | $ | 233,131 |  |  | $ | 1,440,593 |
Schedule of Changes in the Fair Value of Plans Level 3 Assets | The following table summarizes the changes in the fair value of the Company’s non-U.S. Pension Plans’ Level 3 assets for the years ended September 26, 2025 and September 27, 2024 (in thousands):
| Real Estate |  | Insurance Contracts |  | Hedge Funds
Balance at Balance at September 29, 2023 | $ | 84,755 |  |  | $ | 87,160 |  |  | $ | 78,617 |
Net purchases, sales, and settlements | (59,738) |  |  | (31,262) |  |  | (19,567) |
Realized and unrealized gains | 3,993 |  |  | 2,923 |  |  | 7,532 |
Effect of exchange rate changes | 13,469 |  |  | 3,516 |  |  | 15,189 |
Balance at September 27, 2024 | $ | 42,479 |  |  | $ | 62,337 |  |  | $ | 81,771 |
Net purchases, sales and settlements | (15,055) |  |  | (3,937) |  |  | (238) |
Realized and unrealized losses | 104 |  |  | (1,495) |  |  | 6,675 |
Effect of exchange rate changes | 1,333 |  |  | 227 |  |  | 5,682 |
Balance at September 26, 2025 | $ | 28,861 |  |  | $ | 57,132 |  |  | $ | 93,890 |
Schedule of Net Benefit Costs | The following table presents the components of net periodic benefit cost for the Company’s Non-U.S. plans recognized in the accompanying Consolidated Statements of Earnings for the years ended September 26, 2025, September 27, 2024 and September 29, 2023 (in thousands):
| September 26, 2025 |  | September 27, 2024 |  | September 29, 2023
Service cost | $ | 9,855 |  |  | $ | 8,922 |  |  | $ | 6,926 |
Interest cost | 74,598 |  |  | 71,270 |  |  | 74,077 |
Expected return on plan assets | (89,279) |  |  | (76,510) |  |  | (73,387) |
Actuarial losses | 10,250 |  |  | 7,320 |  |  | 6,317 |
Prior service cost | 1,608 |  |  | 1,501 |  |  | 1,424 |
Net pension cost, before special items | $ | 7,032 |  |  | $ | 12,503 |  |  | $ | 15,357 |
Curtailment expense/Settlement losses | (9) |  |  | 258 |  |  | 208 |
Total net periodic pension cost recognized | $ | 7,023 |  |  | $ | 12,761 |  |  | $ | 15,565 |

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