v3.26.1
Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Related Party Transactions      
Transfer of net assets to the parent in a non cash transaction $ 9.5    
Related party notes receivable $ 3.8   $ 46.4
Financing Receivable, after Allowance for Credit Loss, Current, Related Party [Extensible Enumeration] Related Party [Member]   Related Party [Member]
Noncurrent related party notes receivable $ 0.0   $ 69.4
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Related Party [Extensible Enumeration] Related Party [Member]   Related Party [Member]
Related party notes payable $ 10.5   $ 91.1
Notes Payable, Current, Related Party [Extensible Enumeration] Related Party [Member]   Related Party [Member]
Decrease in related party notes receivable $ 112.0    
Decrease in related party notes payable 80.6    
Modine      
Related Party Transactions      
Transfer of net assets to the parent in a non cash transaction 9.5    
Modine | Selling, general and administrative expenses      
Related Party Transactions      
Related party transaction amount   $ 0.4  
Modine | Interest expense      
Related Party Transactions      
Related party transaction amount 0.8 0.8  
Modine | Interest income      
Related Party Transactions      
Related party transaction amount 1.6 1.2  
Modine | Management costs and corporate support services      
Related Party Transactions      
Related party transaction amount $ 8.0 $ 5.9