Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 230.9		$ 230.9
Goodwill, ending balance	$ 240.7			240.7
Intangible Assets [Abstract]
Gross carrying value	237.9			237.9		$ 245.8
Accumulated amortization	(72.1)			(72.1)		(57.5)
Net intangible assets	165.8			165.8		188.3
Amortization expense	6.9		$ 2.0	13.8	$ 4.0
Estimated Future Amortization Expense [Abstract]
Remainder of fiscal 2025	14.0			14.0
2026	18.0			18.0
2027	16.0			16.0
2028	16.0			16.0
2029	15.0			15.0
Climate Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance		230.9		230.9
Acquisition adjustment		7.4		7.4
Effect of exchange rate changes				2.4
Goodwill, ending balance	240.7			240.7
Customer relationships
Intangible Assets [Abstract]
Gross carrying value	151.5			151.5		150.5
Accumulated amortization	(37.8)			(37.8)		(26.3)
Net intangible assets	113.7			113.7		124.2
Trade names
Intangible Assets [Abstract]
Gross carrying value	53.6			53.6		62.8
Accumulated amortization	(19.9)			(19.9)		(18.5)
Net intangible assets	33.7			33.7		44.3
Acquired technology
Intangible Assets [Abstract]
Gross carrying value	32.8			32.8		32.5
Accumulated amortization	(14.4)			(14.4)		(12.7)
Net intangible assets	18.4			18.4		$ 19.8
Scott Springfield Manufacturing
Goodwill [Roll Forward]
Acquisition adjustment		7.4
Goodwill, ending balance	$ 72.6			$ 72.6
Scott Springfield Manufacturing | Trade names
Goodwill [Roll Forward]
Measurement period adjustment to intangible asset		$ (9.6)