v3.26.1
Forward and Swap Contracts (Details)
$ in Millions, $ in Millions, $ in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2026
USD ($)
lb
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2026
MXN ($)
Mar. 31, 2026
NZD ($)
Mar. 31, 2026
AUD ($)
Mar. 31, 2026
USD ($)
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold              
Derivative [Line Items]              
Gain (Loss) on Sale of Commodity Contracts $ (0.6) $ (0.2) $ (1.6)        
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense              
Derivative [Line Items]              
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net $ (0.5) 2.0 $ 1.3        
Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccruedLiabilitiesCurrent              
Derivative [Line Items]              
Derivative Assets   0.0         $ 0.0
Derivative Liabilities   $ 0.6         $ 0.7
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Accrued expenses and other   Accrued expenses and other Accrued expenses and other Accrued expenses and other Accrued expenses and other
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Accrued expenses and other   Accrued expenses and other Accrued expenses and other Accrued expenses and other Accrued expenses and other
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherPrepaidExpenseCurrent              
Derivative [Line Items]              
Derivative Assets   $ 0.1         $ 0.2
Derivative Liabilities   $ 0.0         $ 0.0
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Prepaid expenses and other current assets   Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Prepaid expenses and other current assets   Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets
212230 Copper, Nickel, Lead, and Zinc Mining [Member]              
Derivative [Line Items]              
Derivative, Nonmonetary Notional Amount, Mass | lb 600,000            
Australia, Dollars | Foreign Exchange Forward              
Derivative [Line Items]              
Derivative Asset, Notional Amount           $ 4.0  
Mexico, Pesos | Foreign Exchange Forward              
Derivative [Line Items]              
Derivative Asset, Notional Amount       $ 210.0      
New Zealand, Dollars | Foreign Exchange Forward              
Derivative [Line Items]              
Derivative Asset, Notional Amount         $ 7.0