v3.26.1
Income Taxes - Reconciliation between the U.S. federal statutory income tax rate and the Company's effective tax rate (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Effective income tax reconciliation, Amount      
U.S. federal statutory income tax rate $ 39.2 $ 53.3 $ 45.1
State taxes, net of federal benefit (a) 1.9 1.0 1.4
Foreign-derived intangible income (3.6) (2.7)  
U.S. tax effects on foreign branch income     (6.0)
Disposition of businesses (c)     (1.8)
Other (0.4) 0.1 (0.8)
Nondeductible compensation 8.0 7.4 4.7
Stock-based compensation awards (6.6) (5.1) (4.1)
Other 1.3 0.2 0.4
Tax credits (1.4) (2.3) (2.1)
Pension termination (d) 13.7    
Income Tax Benefit related to pension termination charge 13.1    
Changes in unrecognized tax benefits 0.4 0.5 (0.5)
Total income tax provision (benefit) $ 63.2 $ 68.5 $ 51.2
Tax Jurisdiction of Domicile [Extensible Enumeration] U.S. Plans    
Effective income tax reconciliation, Percent      
U.S. federal statutory income tax rate 21.00% 21.00% 21.00%
State taxes, net of federal benefit (a) 1.00% 0.40% 0.70%
Foreign-derived intangible income (1.90%) (1.10%)  
U.S. tax effects on foreign branch income     (2.80%)
Disposition of businesses (c)     (0.80%)
Other (0.20%)   (0.40%)
Nondeductible compensation 4.30% 2.90% 2.20%
Stock-based compensation awards (3.50%) (2.00%) (1.90%)
Other 0.70% 0.10% 0.20%
Tax credits (0.70%) (0.90%) (1.00%)
Pension termination (d) 7.30%    
Changes in unrecognized tax benefits 0.20% 0.20% (0.20%)
Effective tax rate 33.90% 27.00% 23.90%
U.S. Plans      
Effective income tax reconciliation, Amount      
Changes in valuation allowances $ 1.0 $ 0.2 $ 8.3
Other $ (0.1) $ (0.7) $ 0.4
Effective income tax reconciliation, Percent      
Changes in valuation allowances 0.50% 0.10% 3.90%
Other   (0.20%) 0.10%
Germany      
Effective income tax reconciliation, Amount      
Changes in valuation allowances $ 2.4 $ 4.1 $ 2.9
Other $ 1.5 $ (0.5) $ (1.0)
Effective income tax reconciliation, Percent      
Changes in valuation allowances 1.30% 1.60% 1.40%
Other 0.80% (0.20%) (0.50%)
Hungary      
Effective income tax reconciliation, Amount      
Changes in valuation allowances $ (2.0)    
Expiration of attribute carryforward 2.0    
Other $ (1.1)    
Effective income tax reconciliation, Percent      
Changes in valuation allowances (1.10%)    
Expiration of attribute carryforward 1.10%    
Other (0.60%)    
India      
Effective income tax reconciliation, Amount      
Withholding tax $ 2.1    
Other $ 0.9    
Effective income tax reconciliation, Percent      
Withholding tax 1.10%    
Other 0.50%    
Mexico      
Effective income tax reconciliation, Amount      
Other   $ 3.0  
Effective income tax reconciliation, Percent      
Other   1.20%  
Brazil      
Effective income tax reconciliation, Amount      
Other   $ 2.9  
Effective income tax reconciliation, Percent      
Other   1.10%  
Italy      
Effective income tax reconciliation, Amount      
Other   $ 2.8  
Effective income tax reconciliation, Percent      
Other   1.10%  
Other foreign jurisdictions      
Effective income tax reconciliation, Amount      
Other $ 4.0 $ 4.3 $ 4.3
Effective income tax reconciliation, Percent      
Other 2.10% 1.70% 2.00%