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Retirement Plans (Tables)
3 Months Ended
Dec. 31, 2021
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension and Postretirement Cost (Benefit) The Company’s net periodic pension and postretirement costs for these plans for the three months ended December 31 were as follows:
Three Months Ended
December 31,
 20212020
Service cost$1.0 $1.1 
Interest cost2.6 2.5 
Expected return on plan assets(5.3)(5.6)
Recognized net actuarial loss1.5 2.3 
Net periodic cost$(0.2)$0.3