Segment and Geographic Information, Net sales by End Market (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Net sales	$ 556.7	$ 541.0	$ 548.9	$ 566.1	$ 566.6	$ 512.7	$ 508.3	$ 515.5	$ 2,212.7	$ 2,103.1	$ 1,503.0
Commercial HVAC&R [Member]
Revenue from External Customer [Line Items]
Net sales									674.0	648.3	323.8
Automotive [Member]
Revenue from External Customer [Line Items]
Net sales									542.8	526.0	461.0
Commercial Vehicle [Member]
Revenue from External Customer [Line Items]
Net sales									387.6	381.7	382.5
Off-Highway [Member]
Revenue from External Customer [Line Items]
Net sales									314.1	271.2	202.8
Data Center Cooling [Member]
Revenue from External Customer [Line Items]
Net sales									187.0	137.6	57.1
Industrial Cooling [Member]
Revenue from External Customer [Line Items]
Net sales									47.8	67.6	18.6
Other [Member]
Revenue from External Customer [Line Items]
Net sales									$ 59.4	$ 70.7	$ 57.2