Segment Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023
Segment Information [Abstract]
Net sales		$ 620.5	$ 578.8	$ 1,242.9	$ 1,119.8
Gross profit		$ 135.1	$ 96.2	$ 263.0	$ 179.6
Gross profit (% of sales)		21.80%	16.60%	21.20%	16.00%
Operating income		$ 65.7	$ 36.8	$ 132.2	$ 62.4
Total assets		1,605.1		1,605.1		$ 1,565.9
Climate Solutions [Member]
Segment Information [Abstract]
Net sales		275.8	255.8	547.6	500.0
Performance Technologies [Member]
Segment Information [Abstract]
Net sales		344.7	323.0	695.3	619.8
Other [Member]
Segment Information [Abstract]
Total assets	[1]	906.6		906.6		843.0
Operating Segments [Member]
Segment Information [Abstract]
Net sales		627.5	585.9	1,258.2	1,134.6
Gross profit		$ 134.6	$ 96.5	$ 262.2	$ 179.9
Gross profit (% of sales)		21.40%	16.50%	20.80%	15.90%
Operating income		$ 78.2	$ 49.0	$ 154.5	$ 83.4
Operating Segments [Member] | Segment Total [Member]
Segment Information [Abstract]
Net sales		627.5	585.9	1,258.2	1,134.6
Operating Segments [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales		275.8	255.9	547.6	500.3
Gross profit		$ 71.8	$ 57.3	$ 140.8	$ 107.7
Gross profit (% of sales)		26.00%	22.40%	25.70%	21.50%
Operating income		$ 44.6	$ 32.7	$ 88.9	$ 59.7
Total assets		336.8		336.8		334.8
Operating Segments [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales		351.7	330.0	710.6	634.3
Gross profit		$ 62.8	$ 39.2	$ 121.4	$ 72.2
Gross profit (% of sales)		17.80%	11.90%	17.10%	11.40%
Operating income		$ 33.6	$ 16.3	$ 65.6	$ 23.7
Total assets		361.7		361.7		$ 388.1
Inter-segment Sales [Member]
Segment Information [Abstract]
Net sales		7.0	7.1	15.3	14.8
Inter-segment Sales [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales		0.0	0.1	0.0	0.3
Inter-segment Sales [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales		7.0	7.0	15.3	14.5
Corporate and Eliminations [Member]
Segment Information [Abstract]
Net sales		(7.0)	(7.1)	(15.3)	(14.8)
Gross profit		$ 0.5	$ (0.3)	$ 0.8	$ (0.3)
Gross profit (% of sales)		0.00%	0.00%	0.00%	0.00%
Operating income		$ (12.5)	$ (12.2)	$ (22.3)	$ (21.0)

[1] Represents cash and cash equivalents, assets held for sale, other current assets, property plant and equipment, intangible assets, goodwill, deferred income taxes, and other noncurrent assets for the Climate Solutions and Performance Technologies segments and Corporate.