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POSTRETIREMENT AND POSTEMPLOYMENT BENEFITS - Benefit Obligations and Plan Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 29, 2024 | Sep. 24, 2023 | Sep. 25, 2022
Other Postretirement Benefits Plan |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation, beginning of year | $ 11,252 | $ 12,287 |
Service cost | 50 | 68 |
Interest cost | 596 | 598 |
Actuarial loss (gain) | 1,215 | (1,049) |
Benefits paid, net of premiums received | (1,712) | (652) |
Benefit obligation, end of year | 10,217 | 11,252 | $ 12,287
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets, beginning of year: | 25,809 | 23,903 |
Actual return on plan assets | 2,615 | 2,393 |
Employer contributions | 858 | 165 |
Benefits paid, net of premiums and Medicare Part D subsidies received | (1,712) | (660) |
Plan participant contributions | 0 | 8 |
Fair value of plan assets, end of year | 27,570 | 25,809 | 23,903
Funded status | 17,353 | 14,557 |
Pension Plan |  |  |
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation, beginning of year | 199,187 | 210,806 |
Service cost | 5 | 19 | 488
Interest cost | 9,274 | 10,368 | 7,999
Actuarial loss (gain) | 15,703 | (9,876) |
Benefits paid, net of premiums received | (13,021) | (12,130) |
Liability (gain)/loss due to curtailment | (1,184) | 0 | (1,000)
Benefit obligation, end of year | 188,528 | 199,187 | 210,806
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets, beginning of year: | 210,031 | 211,058 |
Actual return on plan assets | 19,957 | 12,638 |
Fair value of plan assets, end of year | 193,192 | 210,031 | $ 211,058
Funded status | $ 4,664 | $ 10,844 |

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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