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Defined Benefit Pension and Other Postretirement Plans (Tables)
9 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Components of Net Periodic Pension Cost Net periodic pension cost includes the following components:
Three Months Ended June 30,20222021
Service cost$$
Interest cost
Expected return on assets(12)(10)
Amortization of:
Actuarial loss
Net cost$— $
   
Nine Months Ended June 30,20222021
Service cost$12 $
Interest cost19 16 
Expected return on assets(37)(30)
Amortization of:
Actuarial loss11 
Net cost$— $