v3.24.1.1.u2
Significant Accounting Policies, Tooling and Research and Development (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Tooling [Abstract]      
Property, plant and equipment - net $ 365.7 $ 314.5  
Customer owned tooling receivables 7.6 10.9  
Research and Development [Abstract]      
Research and development cost $ 42.0 44.0 $ 50.3
Tooling [Member]      
Tooling [Abstract]      
Property, plant and equipment, depreciable lives 3 years    
Property, plant and equipment - net $ 16.1 $ 17.1