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Pension & Postretirement Plans (Tables)
3 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Schedule of Pension and Postretirement Plan Expenses
Total periodic pension and postretirement (income) expense is summarized below:
 Three Months Ended December 31,
 2022 2023 
Service cost$12 9 
Interest cost54 55 
Expected return on plan assets
(71)(74)
Net amortization(20)(14)
Total$(25)(24)