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Revenue Recognition (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Mar. 31, 2024
Disaggregation of Revenue [Abstract]          
Net sales $ 658.0 $ 620.5 $ 1,319.5 $ 1,242.9  
Contract Balances [Abstract]          
Contract assets 14.5   14.5   $ 12.9
Contract liabilities 51.9   51.9   $ 79.4
Increase in contract assets     1.6    
Decrease in contract liabilities     (27.5)    
Products Transferred at a Point in Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 645.5 605.3 1,292.0 1,203.5  
Products Transferred Over Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 18.4 21.2 38.2 52.8  
Americas [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 435.3 352.5 860.0 678.5  
Europe [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 178.4 219.1 370.0 466.0  
Asia [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 50.2 54.9 100.2 111.8  
Data Center Cooling [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 158.9 78.8 321.5 147.0  
Heat Transfer [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 103.4 119.2 215.2 260.0  
HVAC&R [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 104.1 91.2 186.9 168.9  
Air-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 155.2 173.3 323.8 346.0  
Liquid-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 99.1 126.4 203.1 261.1  
Advanced Solutions [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 37.3 31.6 69.0 59.9  
Climate Solutions          
Disaggregation of Revenue [Abstract]          
Net sales 366.4 289.2 723.6 575.9  
Climate Solutions | Products Transferred at a Point in Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 350.9 271.6 691.6 529.8  
Climate Solutions | Products Transferred Over Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 15.5 17.6 32.1 46.1  
Climate Solutions | Americas [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 252.6 174.1 492.6 327.4  
Climate Solutions | Europe [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 105.9 109.1 217.4 236.0  
Climate Solutions | Asia [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 7.9 6.0 13.7 12.5  
Climate Solutions | Data Center Cooling [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 158.9 78.8 321.5 147.0  
Climate Solutions | Heat Transfer [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 103.4 119.2 215.2 260.0  
Climate Solutions | HVAC&R [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 104.1 91.2 186.9 168.9  
Climate Solutions | Air-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Climate Solutions | Liquid-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Climate Solutions | Advanced Solutions [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Performance Technologies [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 291.6 331.3 595.9 667.0  
Performance Technologies [Member] | Products Transferred at a Point in Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 294.6 333.7 600.4 673.7  
Performance Technologies [Member] | Products Transferred Over Time [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 2.9 3.6 6.1 6.7  
Performance Technologies [Member] | Americas [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 182.7 178.4 367.4 351.1  
Performance Technologies [Member] | Europe [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 72.5 110.0 152.6 230.0  
Performance Technologies [Member] | Asia [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 42.3 48.9 86.5 99.3  
Performance Technologies [Member] | Data Center Cooling [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Performance Technologies [Member] | Heat Transfer [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Performance Technologies [Member] | HVAC&R [Member]          
Disaggregation of Revenue [Abstract]          
Net sales     0.0 0.0  
Performance Technologies [Member] | Air-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 155.2 173.3 323.8 346.0  
Performance Technologies [Member] | Liquid-Cooled [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 99.1 126.4 203.1 261.1  
Performance Technologies [Member] | Advanced Solutions [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 37.3 31.6 69.0 59.9  
Operating Segments [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 663.9 626.5 1,330.2 1,256.3  
Operating Segments [Member] | Climate Solutions          
Disaggregation of Revenue [Abstract]          
Net sales 366.4 289.2 723.7 575.9  
Operating Segments [Member] | Performance Technologies [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 297.5 337.3 606.5 680.4  
Inter-segment Sales [Member]          
Disaggregation of Revenue [Abstract]          
Net sales 5.9 6.0 10.7 13.4  
Inter-segment Sales [Member] | Climate Solutions          
Disaggregation of Revenue [Abstract]          
Net sales     0.1 0.0  
Inter-segment Sales [Member] | Performance Technologies [Member]          
Disaggregation of Revenue [Abstract]          
Net sales $ 5.9 $ 6.0 $ 10.6 $ 13.4