Segment Information (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
Segment Information [Abstract]
Net sales	$ 658.0	$ 620.5	$ 1,319.5	$ 1,242.9
Gross profit	$ 165.6	$ 135.1	$ 328.2	$ 263.0
Gross profit (% of sales)	25.20%	21.80%	24.90%	21.20%
Operating income	$ 75.3	$ 65.7	$ 149.7	$ 132.2
Total assets	1,915.6		1,915.6		$ 1,851.5
Climate Solutions [Member]
Segment Information [Abstract]
Net sales	366.4	289.2	723.6	575.9
Performance Technologies [Member]
Segment Information [Abstract]
Net sales	291.6	331.3	595.9	667.0
Segment Reconciling Items and Corporate [Member]
Segment Information [Abstract]
Total assets	1,096.2		1,096.2		1,070.7
Operating Segments [Member]
Segment Information [Abstract]
Net sales	663.9	626.5	1,330.2	1,256.3
Gross profit	$ 166.4	$ 134.5	$ 330.7	$ 262.2
Gross profit (% of sales)	25.10%	21.50%	24.90%	20.90%
Operating income	$ 95.5	$ 78.3	$ 186.8	$ 154.5
Operating Segments [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales	366.4	289.2	723.7	575.9
Gross profit	$ 106.3	$ 76.9	$ 207.1	$ 152.7
Gross profit (% of sales)	29.00%	26.60%	28.60%	26.50%
Operating income	$ 64.7	$ 47.1	$ 124.5	$ 95.7
Total assets	433.0		433.0		412.7
Operating Segments [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales	297.5	337.3	606.5	680.4
Gross profit	$ 60.1	$ 57.6	$ 123.6	$ 109.5
Gross profit (% of sales)	20.20%	17.10%	20.40%	16.10%
Operating income	$ 30.8	$ 31.2	$ 62.3	$ 58.8
Total assets	386.4		386.4		$ 368.1
Inter-segment Sales [Member]
Segment Information [Abstract]
Net sales	5.9	6.0	10.7	13.4
Inter-segment Sales [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales			0.1	0.0
Inter-segment Sales [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales	5.9	6.0	10.6	13.4
Corporate and Eliminations [Member]
Segment Information [Abstract]
Net sales	(5.9)	(6.0)	(10.7)	(13.4)
Gross profit	$ (0.8)	$ 0.6	$ (2.5)	$ 0.8
Gross profit (% of sales)	0.00%	0.00%	0.00%	0.00%
Operating income	$ (20.2)	$ (12.6)	$ (37.1)	$ (22.3)