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Pension, Postretirement and Postemployment Defined Benefit Plans (Tables)
9 Months Ended
Jun. 23, 2024
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension and Postretirement Cost (Benefit) Components
The net periodic pension and postretirement cost (benefit) components for our plans are as follows:
PENSION PLANSThree months ended Nine months ended
(Thousands of Dollars)June 23,
2024
June 25,
2023
June 23,
2024
June 25,
2023
Service cost for benefits earned during the period15 
Interest cost on projected benefit obligation2,253 2,592 7,021 7,776 
Expected return on plan assets(2,310)(2,548)(7,073)(7,644)
Amortization of net (gain) loss(1)(4)
Amortization of prior service benefit212 213 636 639 
Settlement gain— — (2,409)— 
Net periodic pension (benefit) cost155 264 (1,826)792 
POSTRETIREMENT MEDICAL PLANSThree months ended Nine months ended
(Thousands of Dollars)June 23,
2024
June 25,
2023
June 23,
2024
June 25,
2023
Service cost for benefits earned during the period13 17 38 51 
Interest cost on projected benefit obligation149 149 447 447 
Expected return on plan assets(320)(295)(959)(885)
Amortization of net gain(308)(254)(925)(762)
Amortization of prior service benefit(94)(162)(282)(486)
Curtailment gain— — (1,184)— 
Net periodic postretirement benefit(560)(545)(2,865)(1,635)