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Pensions (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Mar. 31, 2026
Net Periodic Benefit Cost [Abstract]      
Net periodic benefit cost [1] $ 1.2 $ 0.8  
Pension [Member]      
Net Periodic Benefit Cost [Abstract]      
Service cost 0.0 0.1  
Interest cost 2.3 2.4  
Expected return on plan assets (2.2) (2.6)  
Amortization of unrecognized net loss 1.2 1.1  
Net periodic benefit cost 1.3 $ 1.0  
Pension [Member] | U.S Plans [Member]      
Employer Contributions [Abstract]      
Cash contributions by employer 1.5    
Pension [Member] | U.S Plans [Member] | Minimum [Member]      
Termination of U.S. Pension Plans [Abstract]      
Expected employer contribution during fiscal 2026 15.0    
Pension [Member] | U.S Plans [Member] | Maximum [Member]      
Termination of U.S. Pension Plans [Abstract]      
Expected employer contribution during fiscal 2026 $ 30.0    
Pension [Member] | U.S Plans [Member] | Plan [Member] | Minimum [Member]      
Termination of U.S. Pension Plans [Abstract]      
Non-cash pension settlement charges     $ (120.0)
Pension [Member] | U.S Plans [Member] | Plan [Member] | Maximum [Member]      
Termination of U.S. Pension Plans [Abstract]      
Non-cash pension settlement charges     $ (130.0)
[1] Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.