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Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance			$ 166.1
Effect of exchange rate changes			6.3
Goodwill, ending balance	$ 172.4		172.4
Intangible Assets [Abstract]
Gross carrying value	149.4		149.4		$ 142.7
Accumulated amortization	(44.9)		(44.9)		(36.4)
Net intangible assets	104.5		104.5		106.3
Amortization expense	2.2	$ 2.3	6.4	$ 6.7
Estimated Future Amortization Expense [Abstract]
Remainder of fiscal 2021	2.1		2.1
2022	8.0		8.0
2023	8.0		8.0
2024	8.0		8.0
2025	8.0		8.0
2026	8.0		8.0
CIS [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			152.6
Effect of exchange rate changes			5.2
Goodwill, ending balance	157.8		157.8
BHVAC [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			13.5
Effect of exchange rate changes			1.1
Goodwill, ending balance	14.6		14.6
Customer Relationships [Member]
Intangible Assets [Abstract]
Gross carrying value	64.0		64.0		60.8
Accumulated amortization	(16.2)		(16.2)		(12.6)
Net intangible assets	47.8		47.8		48.2
Trade Names [Member]
Intangible Assets [Abstract]
Gross carrying value	60.3		60.3		58.3
Accumulated amortization	(19.0)		(19.0)		(16.2)
Net intangible assets	41.3		41.3		42.1
Acquired Technology [Member]
Intangible Assets [Abstract]
Gross carrying value	25.1		25.1		23.6
Accumulated amortization	(9.7)		(9.7)		(7.6)
Net intangible assets	$ 15.4		$ 15.4		$ 16.0

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in remainder of current fiscal year.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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