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Pension, Postretirement and Postemployment Defined Benefit Plans (Tables)
3 Months Ended
Dec. 24, 2023
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
(Thousands of Dollars)December 24,
2023
December 25,
2022
Service cost for benefits earned during the period
Interest cost on projected benefit obligation2,515 2,592 
Expected return on plan assets(2,453)(2,548)
Amortization of net (gain) loss(2)
Amortization of prior service benefit212 213 
Settlement gain(2,409)— 
Net periodic pension (benefit) cost(2,136)264 
POSTRETIREMENT MEDICAL PLANSThree months ended
(Thousands of Dollars)December 24,
2023
December 25,
2022
Service cost for benefits earned during the period13 17 
Interest cost on projected benefit obligation149 149 
Expected return on plan assets(320)(295)
Amortization of net gain(308)(254)
Amortization of prior service benefit(94)(162)
Curtailment gain(1,184)— 
Net periodic postretirement benefit(1,744)(545)