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Retirement Benefits
 3 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Retirement Benefits Retirement Benefits
 
Defined Benefit Plans

Components of net periodic pension cost (benefit) included in the Consolidated Statements of Operations were as follows:
 
U.S. Pension BenefitsNon-U.S. Pension Benefits
Three Months Ended December 31,Three Months Ended December 31,
 2025202420252024
Service costs$— $— $0.8 $0.7 
Interest costs0.2 0.2 0.7 0.8 
Expected return on plan assets— — (0.3)(0.3)
Amortization of net loss (gain)0.1 — 0.1 (0.2)
Settlement gain— (1.7)— — 
Net periodic pension cost (benefit) $0.3 $(1.5)$1.3 $1.0 

On July 18, 2023, we announced an offer to provide former employees who are participants in the Company’s U.S. defined benefit pension plan (the “Plan”) the opportunity to elect a lump sum distribution of their earned Plan benefits. The Plan’s fiduciaries made lump sum payments to electing eligible participants in December 2023, funded by the existing assets in the Plan. In April 2024, the remaining assets of the Plan were used to purchase annuities to support the remaining obligation, resulting in the termination and liquidation of the Plan. During the three months ended December 31, 2024, the Company received one-time premium refunds of $1.7 related to the termination of the Plan, which was recorded as a pretax pension settlement gain on the Consolidated Statement of Operations.

Defined Contribution Plans
Expenses related to the Company’s defined contribution plans were $3.1 and $3.1 for the three months ended December 31, 2025, and 2024, respectively