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Pension & Postretirement Plans (Tables)
3 Months Ended
Dec. 31, 2021
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,
 2020 2021 
Service cost$21 19 
Interest cost32 34 
Expected return on plan assets
(84)(78)
Net amortization35 23 
Total$(2)