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Pension and Other Postretirement Benefits (Tables)
 6 Months Ended
Mar. 31, 2024
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]  
Schedule of Net Benefit Costs
The following tables present the components of net periodic benefit income for the pension plans. Service cost was reported in “Cost of goods sold” and “Selling, general and administrative expenses” and all other components of net periodic benefit income were reported in “Other income, net” in the Condensed Consolidated Statements of Operations.
North America
Three Months Ended
March 31,		Six Months Ended
March 31,
2024202320242023
Service cost$0.5 $0.5 $1.0 $1.1 
Interest cost1.4 1.3 2.8 2.6 
Expected return on plan assets(2.0)(1.9)(4.1)(3.8)
Recognized net actuarial gain(0.1)(0.1)(0.2)(0.1)
Recognized prior service cost0.1 0.1 0.1 0.1 
Net periodic benefit income$(0.1)$(0.1)$(0.4)$(0.1)

Other International
Three Months Ended
March 31,		Six Months Ended
March 31,
2024202320242023
Service cost$0.1 $— $0.1 $— 
Interest cost6.6 5.7 12.7 11.3 
Expected return on plan assets(8.9)(7.6)(17.2)(15.0)
Recognized net actuarial loss— 0.1 0.1 0.1 
Recognized prior service cost0.1 0.1 0.2 0.2 
Net periodic benefit income$(2.1)$(1.7)$(4.1)$(3.4)
The following table presents the components of net periodic benefit cost (income) for the North American other postretirement benefit plans. Service cost was reported in “Cost of goods sold” and “Selling, general and administrative expenses” and all other components of net periodic benefit cost (income) were reported in “Other income, net” in the Condensed Consolidated Statements of Operations.
Three Months Ended
March 31,		Six Months Ended
March 31,
2024202320242023
Service cost$— $— $0.1 $0.1 
Interest cost0.6 0.7 1.3 1.3 
Recognized net actuarial gain(0.2)(0.2)(0.5)(0.3)
Recognized prior service credit(0.1)(1.1)(0.3)(2.3)
Net periodic benefit cost (income)$0.3 $(0.6)$0.6 $(1.2)