Segment Information (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 ($)
Segment Information [Abstract]
Number of operating segments | Segment				2
Net sales		$ 578.8	$ 478.9	$ 1,119.8	$ 973.5
Gross profit		$ 96.2	$ 66.3	$ 179.6	$ 139.5
Gross profit (% of sales)		16.60%	13.80%	16.00%	14.30%
Operating income		$ 36.8	$ 10.5	$ 62.4	$ 19.2
Total assets		1,392.2		1,392.2		$ 1,427.0
Segment Total [Member]
Segment Information [Abstract]
Net sales		585.9	488.0	1,134.6	991.6
Climate Solutions [Member]
Segment Information [Abstract]
Net sales		255.9	217.2	500.3	423.7
Performance Technologies [Member]
Segment Information [Abstract]
Net sales		330.0	270.8	634.3	567.9
Other [Member]
Segment Information [Abstract]
Total assets	[1]	758.0		758.0		778.3
Operating Segments [Member]
Segment Information [Abstract]
Net sales		578.8	478.9	1,119.8	973.5
Gross profit		$ 96.5	$ 65.4	$ 179.9	$ 138.2
Gross profit (% of sales)		16.50%	13.40%	15.90%	13.90%
Operating income		$ 49.0	$ 16.0	$ 83.4	$ 42.4
Operating Segments [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales		255.8	217.0	500.0	423.5
Gross profit		$ 57.3	$ 35.9	$ 107.7	$ 68.5
Gross profit (% of sales)		22.40%	16.50%	21.50%	16.20%
Operating income		$ 32.7	$ 13.9	$ 59.7	$ 24.6
Total assets		295.0		295.0		291.7
Operating Segments [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales		323.0	261.9	619.8	550.0
Gross profit		$ 39.2	$ 29.5	$ 72.2	$ 69.7
Gross profit (% of sales)		11.90%	10.90%	11.40%	12.30%
Operating income		$ 16.3	$ 2.1	$ 23.7	$ 17.8
Total assets		339.2		339.2		$ 357.0
Inter-segment Sales [Member]
Segment Information [Abstract]
Net sales		7.1	9.1	14.8	18.1
Inter-segment Sales [Member] | Climate Solutions [Member]
Segment Information [Abstract]
Net sales		0.1	0.2	0.3	0.2
Inter-segment Sales [Member] | Performance Technologies [Member]
Segment Information [Abstract]
Net sales		7.0	8.9	14.5	17.9
Corporate and Eliminations [Member]
Segment Information [Abstract]
Net sales		(7.1)	(9.1)	(14.8)	(18.1)
Gross profit		$ (0.3)	$ 0.9	$ (0.3)	$ 1.3
Gross profit (% of sales)		0.00%	0.00%	0.00%	0.00%
Operating income		$ (12.2)	$ (5.5)	$ (21.0)	$ (23.2)

[1] Represents cash and cash equivalents, 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.