v3.26.1
PENSION, POSTRETIREMENT AND POSTEMPLOYMENT DEFINED BENEFIT PLANS - Schedule of Net Periodic Cost (Benefit) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 28, 2026
Jun. 29, 2025
Jun. 28, 2026
Jun. 29, 2025
Defined Benefit Plan Disclosure [Line Items]        
Settlement gain $ (2,330) $ 0 $ (2,330) $ 0
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost for benefits earned during the period 1 1 3 3
Interest cost on projected benefit obligation 1,977 2,034 5,931 6,103
Expected return on plan assets (2,467) (2,319) (7,400) (6,956)
Amortization of prior service benefit 212 212 636 636
Net periodic pension benefit (277) (72) (830) (214)
Postretirement Medical Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost for benefits earned during the period 0 1 0 2
Interest cost on projected benefit obligation 83 108 250 325
Expected return on plan assets (391) (410) (1,174) (1,231)
Amortization of net (gain) loss (245) (292) (733) (876)
Amortization of prior service benefit (71) (71) (214) (214)
Settlement gain (2,330) 0 (2,330) 0
Net periodic pension benefit $ (2,954) $ (664) $ (4,201) $ (1,994)