Revenue Recognition (Details) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Segment	Sep. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)
Revenue Recognition [Abstract]
Number of operating segments | Segment			2
Disaggregation of Revenue [Abstract]
Net sales	$ 578.8	$ 478.9	$ 1,119.8	$ 973.5
Contract Balances [Abstract]
Contract assets	25.1		25.1		$ 26.8
Contract liabilities	14.6		14.6		$ 11.8
Decrease in contract assets			(1.7)
Increase in contract liabilities			2.8
Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	552.8	464.4	1,065.4	945.4
Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	33.1	23.6	69.2	46.2
Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	339.1	262.4	642.8	504.7
Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	182.2	170.1	377.3	370.5
Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	64.6	55.5	114.5	116.4
Heat Transfer [Member]
Disaggregation of Revenue [Abstract]
Net sales	134.9	119.2	275.4	236.9
HVAC & Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	89.6	80.5	167.8	151.1
Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	31.3	17.3	56.8	35.5
Air-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	169.3	136.2	322.3	277.7
Liquid-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	119.0	97.1	229.9	215.8
Advanced Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	34.7	28.6	67.6	56.5
Inter-segment Sales [Member]
Disaggregation of Revenue [Abstract]
Net sales	7.1	9.1	14.8	18.1
Segment Total [Member]
Disaggregation of Revenue [Abstract]
Net sales	585.9	488.0	1,134.6	991.6
Climate Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	255.9	217.2	500.3	423.7
Climate Solutions [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	243.0	213.9	473.8	417.3
Climate Solutions [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	12.9	3.3	26.5	6.4
Climate Solutions [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	156.3	117.9	295.7	221.9
Climate Solutions [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	90.9	89.8	189.9	185.8
Climate Solutions [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	8.7	9.5	14.7	16.0
Climate Solutions [Member] | Heat Transfer [Member]
Disaggregation of Revenue [Abstract]
Net sales	134.9	119.2	275.4	236.9
Climate Solutions [Member] | HVAC & Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	89.6	80.5	167.8	151.1
Climate Solutions [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	31.3	17.3	56.8	35.5
Climate Solutions [Member] | Air-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Climate Solutions [Member] | Liquid-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Climate Solutions [Member] | Advanced Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Climate Solutions [Member] | Inter-segment Sales [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.1	0.2	0.3	0.2
Performance Technologies [Member]
Disaggregation of Revenue [Abstract]
Net sales	330.0	270.8	634.3	567.9
Performance Technologies [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	309.8	250.5	591.6	528.1
Performance Technologies [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	20.2	20.3	42.7	39.8
Performance Technologies [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	182.8	144.5	347.1	282.8
Performance Technologies [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	91.3	80.3	187.4	184.7
Performance Technologies [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	55.9	46.0	99.8	100.4
Performance Technologies [Member] | Heat Transfer [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Performance Technologies [Member] | HVAC & Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Performance Technologies [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
Performance Technologies [Member] | Air-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	169.3	136.2	322.3	277.7
Performance Technologies [Member] | Liquid-Cooled [Member]
Disaggregation of Revenue [Abstract]
Net sales	119.0	97.1	229.9	215.8
Performance Technologies [Member] | Advanced Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	34.7	28.6	67.6	56.5
Performance Technologies [Member] | Inter-segment Sales [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 7.0	$ 8.9	$ 14.5	$ 17.9