Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 805.0	$ 616.8	$ 2,226.7	$ 1,936.3
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract assets	22.1		22.1		$ 13.3
Contract liabilities	31.1		31.1		$ 35.1
Increase in contract assets			8.8
Decrease in contract liabilities			(4.0)
Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	555.1	415.7	1,464.9	1,275.7
Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	201.3	160.0	603.8	530.0
Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	54.2	47.3	165.5	147.5
Data Centers
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	296.9	166.9	710.1	488.4
Heat Transfer Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	138.0	121.3	422.4	403.9
HVAC Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	107.1	72.5	260.9	192.0
Heavy-duty equipment
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	92.4	95.5	300.9	308.5
On-highway applications
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	170.6	160.6	532.4	543.5
Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	542.0	360.7	1,393.4	1,084.3
Climate Solutions | Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	416.6	255.5	1,016.8	748.1
Climate Solutions | Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	122.7	97.9	361.0	315.3
Climate Solutions | Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	5.3	7.4	18.6	21.1
Climate Solutions | Data Centers
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	296.9	166.9	710.1	488.4
Climate Solutions | Heat Transfer Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	138.0	121.3	422.4	403.9
Climate Solutions | HVAC Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	107.1	72.5	260.9	192.0
Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	263.0	256.1	833.3	852.0
Performance Technologies | Americas
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	138.5	160.2	448.1	527.6
Performance Technologies | Europe
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	78.6	62.1	242.8	214.7
Performance Technologies | Asia
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	48.9	39.9	146.9	126.4
Performance Technologies | Heavy-duty equipment
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	92.4	95.5	300.9	308.5
Performance Technologies | On-highway applications
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	170.6	160.6	532.4	543.5
Operating segments
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	810.6	623.0	2,234.2	1,953.2
Operating segments | Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	544.6	360.8	1,396.4	1,084.5
Operating segments | Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	266.0	262.2	837.8	868.7
Inter-segment Sales
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	5.6	6.2	7.5	16.9
Inter-segment Sales | Climate Solutions
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	2.6	0.1	3.0	0.2
Inter-segment Sales | Performance Technologies
Disaggregation of Revenue [Abstract]
Disaggregation of revenue	$ 3.0	$ 6.1	$ 4.5	$ 16.7