Segment and Geographic Information, Net sales by End Market (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenue from External Customer [Line Items]
Net sales	$ 1,503.0	$ 1,352.5	$ 1,496.4
Automotive [Member]
Revenue from External Customer [Line Items]
Net sales	461.0	396.8	401.8
Commercial Vehicle [Member]
Revenue from External Customer [Line Items]
Net sales	382.5	459.8	512.5
Off-Highway [Member]
Revenue from External Customer [Line Items]
Net sales	202.8	206.2	274.6
HVAC&R [Member]
Revenue from External Customer [Line Items]
Net sales	400.9	232.1	229.6
Other [Member]
Revenue from External Customer [Line Items]
Net sales	$ 55.8	$ 57.6	$ 77.9