Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefits (Details)

v3.23.1
Retirement Benefits (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
U.S. Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service costs $ 0.0 $ 0.0 $ 0.0 $ 0.0
Interest costs 2.8 1.6 5.6 3.1
Expected return on plan assets (3.4) (2.7) (6.8) (5.4)
Amortization of net loss (gain) 0.1 0.4 0.2 0.8
Net periodic pension (benefit) cost (0.5) (0.7) (1.0) (1.5)
Non-U.S. Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service costs 0.5 0.6 1.0 1.1
Interest costs 1.0 0.2 1.9 0.4
Expected return on plan assets (0.2) (0.3) (0.5) (0.5)
Amortization of net loss (gain) (0.2) 0.0 (0.4) 0.6
Net periodic pension (benefit) cost $ 1.1 $ 0.5 $ 2.0 $ 1.6