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Segment and Geographic Information, Net Sales, Significant Expenses by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Information [Abstract]
Net sales	$ 2,583.5	$ 2,407.8	$ 2,297.9
Cost of sales	1,939.7	1,882.2	1,908.5
Gross profit	643.8	525.6	389.4
Selling, general and administrative expenses	332.1	273.9	234.0
Restructuring expenses	28.2	15.0	5.0
Gain on sale of assets	0.0	(4.0)	0.0
Operating income	283.5	240.7	150.4
Climate Solutions
Segment Information [Abstract]
Net sales	1,440.6	1,108.1	1,056.1
Performance Technologies
Segment Information [Abstract]
Net sales	1,142.9	1,299.7	1,241.8
Operating Segments
Segment Information [Abstract]
Net sales	2,604.3	2,429.4	2,324.2
Operating Segments | Climate Solutions
Segment Information [Abstract]
Net sales	1,440.8	1,108.1	1,056.7
Cost of sales	1,024.7	811.2	816.1
Gross profit	416.1	296.9	240.6
Selling, general and administrative expenses	161.7	115.3	106.2
Restructuring expenses	6.0	3.0	2.2
Operating income	248.4	178.6	132.2
Operating Segments | Performance Technologies
Segment Information [Abstract]
Net sales	1,163.5	1,321.3	1,267.5
Cost of sales	933.1	1,091.7	1,118.4
Gross profit	230.4	229.6	149.1
Selling, general and administrative expenses	101.9	105.9	88.7
Restructuring expenses	20.5	12.0	2.8
Operating income	108.0	111.7	57.6
Inter-segment Sales [Member]
Segment Information [Abstract]
Net sales	20.8	(21.6)	26.3
Inter-segment Sales [Member] | Climate Solutions
Segment Information [Abstract]
Net sales	(0.2)	0.0	(0.6)
Inter-segment Sales [Member] | Performance Technologies
Segment Information [Abstract]
Net sales	(20.6)	(21.6)	(25.7)
Corporate and Eliminations [Member]
Segment Information [Abstract]
Net sales	(20.8)	(21.6)	(26.3)
Cost of sales	(18.1)	(20.7)	(26.0)
Gross profit	(2.7)	(0.9)	(0.3)
Selling, general and administrative expenses	68.5	52.7	39.1
Restructuring expenses	1.7
Gain on sale of assets		(4.0)
Operating income	$ (72.9)	$ (49.6)	$ (39.4)

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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