Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 738.9	$ 658.0	$ 1,421.7	$ 1,319.5
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Increase (decrease) in contract assets			(1.6)
Increase (decrease) in contract liabilities			(5.1)
Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	480.1	435.3	909.8	860.0
Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	204.3	178.4	402.5	370.0
Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	56.3	50.2	111.3	100.2
Data Centers
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	226.3	158.9	413.2	321.5
Heat Transfer Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	141.2	138.0	284.4	282.6
HVAC Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	86.6	69.5	153.8	119.5
Heavy-duty equipment
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	102.2	102.5	208.5	213.0
On-highway applications
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	182.6	189.1	361.8	382.9
Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	454.1	366.4	851.4	723.6
Climate Solutions | Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	323.5	252.6	600.2	492.6
Climate Solutions | Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	124.1	105.9	238.3	217.4
Climate Solutions | Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	6.8	7.9	13.3	13.7
Climate Solutions | Data Centers
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	226.3	158.9	413.2	321.5
Climate Solutions | Heat Transfer Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	141.2	138.0	284.4	282.6
Climate Solutions | HVAC Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	86.6	69.5	153.8	119.5
Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	284.8	291.6	570.3	595.9
Performance Technologies | Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	156.6	182.7	309.6	367.4
Performance Technologies | Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	80.2	72.5	164.2	152.6
Performance Technologies | Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	49.5	42.3	98.0	86.5
Performance Technologies | Heavy-duty equipment
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	102.2	102.5	208.5	213.0
Performance Technologies | On-highway applications
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	182.6	189.1	361.8	382.9
Operating segments
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	740.7	663.9	1,423.6	1,330.2
Operating segments | Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	454.4	366.4	851.8	723.7
Operating segments | Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	286.3	297.5	571.8	606.5
Inter-segment Sales
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	1.8	5.9	1.9	10.7
Inter-segment Sales | Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	0.3		0.4	0.1
Inter-segment Sales | Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 1.5	$ 5.9	$ 1.5	$ 10.6