Goodwill and Intangible Assets (Details) - USD ($) $ in Millions		3 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 165.1
Acquisition	[1]	1.3
Effect of exchange rate changes		3.0
Goodwill, ending balance		169.4
Amortized intangible assets [Abstract]
Gross carrying value		149.5		$ 145.9
Accumulated amortization		(14.5)		(11.8)
Net intangible assets		135.0		134.1
Amortization expense		2.4	$ 0.4
Estimated future amortization expense [Abstract]
Remainder of 2018		7.2
2019		9.5
2020		9.4
2,021		8.8
2,022		7.6
2023 & Beyond		92.5
Asia [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		0.5
Acquisition	[1]	0.0
Effect of exchange rate changes		0.0
Goodwill, ending balance		0.5
Building HVAC [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		13.7
Acquisition	[1]	0.0
Effect of exchange rate changes		0.4
Goodwill, ending balance		14.1
CIS [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance		150.9
Acquisition	[1]	1.3
Effect of exchange rate changes		2.6
Goodwill, ending balance		154.8
Customer Relationships [Member]
Amortized intangible assets [Abstract]
Gross carrying value		62.3		60.5
Accumulated amortization		(2.8)		(1.7)
Net intangible assets		59.5		58.8
Trade Names [Member]
Amortized intangible assets [Abstract]
Gross carrying value		59.4		58.4
Accumulated amortization		(8.1)		(7.2)
Net intangible assets		51.3		51.2
Acquired Technology [Member]
Amortized intangible assets [Abstract]
Gross carrying value		27.8		27.0
Accumulated amortization		(3.6)		(2.9)
Net intangible assets		$ 24.2		$ 24.1

[1] During the first quarter of fiscal 2018, the Company recorded a $1.3 million increase to goodwill as a result of measurement period adjustments made in connection with purchase accounting for the acquisition of Luvata HTS. See Note 2 for additional information.