Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018
Disaggregation of Revenue [Abstract]
Net sales	$ 566.1	$ 515.5
Contract with Customer, Asset and Liability [Abstract]
Contract assets	18.8		$ 13.5
Contract liabilities	11.7		$ 12.4
VTS [Member]
Disaggregation of Revenue [Abstract]
Net sales	352.8	315.3
VTS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	342.8
VTS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	10.0
VTS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	150.9
VTS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	148.4
VTS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	53.5
VTS [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	145.1
VTS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	99.7
VTS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	83.8
VTS [Member] | Commercial HVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
VTS [Member] | Commercial Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
VTS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
VTS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
VTS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	24.2
CIS [Member]
Disaggregation of Revenue [Abstract]
Net sales	183.9	171.4
CIS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	153.6
CIS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	30.3
CIS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	104.8
CIS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	65.2
CIS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	13.9
CIS [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
CIS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
CIS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
CIS [Member] | Commercial HVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	84.5
CIS [Member] | Commercial Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	50.8
CIS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	34.1
CIS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	11.5
CIS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	3.0
BHVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	45.0	43.0
BHVAC [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	45.0
BHVAC [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	25.3
BHVAC [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	19.7
BHVAC [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Commercial HVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	32.0
BHVAC [Member] | Commercial Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	12.2
BHVAC [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0
BHVAC [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.8
Total Segments [Member]
Disaggregation of Revenue [Abstract]
Net sales	581.7	$ 529.7
Total Segments [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	541.4
Total Segments [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	40.3
Total Segments [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	281.0
Total Segments [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	233.3
Total Segments [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	67.4
Total Segments [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	145.1
Total Segments [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	99.7
Total Segments [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	83.8
Total Segments [Member] | Commercial HVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	116.5
Total Segments [Member] | Commercial Refrigeration [Member]
Disaggregation of Revenue [Abstract]
Net sales	50.8
Total Segments [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	46.3
Total Segments [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	11.5
Total Segments [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 28.0