Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Goodwill [Roll Forward]
Goodwill, beginning balance			$ 15.8
Acquisition			159.8
Effect of exchange rate changes			(2.4)
Goodwill, ending balance	$ 173.2		173.2
Amortized intangible assets [Abstract]
Gross carrying value	120.6		120.6		$ 16.4
Accumulated amortization	(9.4)		(9.4)		(8.2)
Net intangible assets	111.2		111.2		8.2
Amortization expense	1.1	$ 0.4	1.9	$ 1.2
Estimated future amortization expense [Abstract]
Remainder of 2017	2.6		2.6
2018	10.2		10.2
2019	10.1		10.1
2020	10.0		10.0
2021	9.5		9.5
2022 & Beyond	68.8		68.8
Asia [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			0.5
Acquisition			0.0
Effect of exchange rate changes			0.0
Goodwill, ending balance	0.5		0.5
BHVAC [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			15.3
Acquisition			0.0
Effect of exchange rate changes			(1.8)
Goodwill, ending balance	13.5		13.5
CIS [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance			0.0
Acquisition			159.8
Effect of exchange rate changes			(0.6)
Goodwill, ending balance	159.2		159.2
Trade Names [Member]
Amortized intangible assets [Abstract]
Gross carrying value	51.4		51.4		8.9
Accumulated amortization	(6.4)		(6.4)		(6.3)
Net intangible assets	45.0		45.0		2.6
Acquired Technology [Member]
Amortized intangible assets [Abstract]
Gross carrying value	23.2		23.2		5.5
Accumulated amortization	(2.2)		(2.2)		(1.5)
Net intangible assets	21.0		21.0		4.0
Customer Relationships [Member]
Amortized intangible assets [Abstract]
Gross carrying value	46.0		46.0		2.0
Accumulated amortization	(0.8)		(0.8)		(0.4)
Net intangible assets	$ 45.2		$ 45.2		$ 1.6