Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Disaggregation of Revenue [Abstract]
Net sales	$ 500.2	$ 548.9	$ 1,029.2	$ 1,115.0
Contract with Customer, Asset and Liability [Abstract]
Contract assets	26.9		26.9		$ 22.6
Contract liabilities	5.8		5.8		$ 4.0
Increase in contract assets			4.3
Increase in contract liabilities			1.8
VTS [Member]
Disaggregation of Revenue [Abstract]
Net sales	299.3	335.6	625.8	688.4
VTS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	290.7	322.5	609.8	665.3
VTS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	8.6	13.1	16.0	23.1
VTS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	144.9	159.2	298.2	310.1
VTS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	111.0	127.3	237.1	275.7
VTS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	43.4	49.1	90.5	102.6
VTS [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	135.1	136.4	264.3	281.5
VTS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	81.8	95.8	180.5	195.5
VTS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	59.6	76.9	133.5	160.7
VTS [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
VTS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
VTS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
VTS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	22.8	26.5	47.5	50.7
CIS [Member]
Disaggregation of Revenue [Abstract]
Net sales	156.7	178.2	325.5	362.1
CIS [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	132.4	142.7	276.3	296.3
CIS [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	24.3	35.5	49.2	65.8
CIS [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	86.0	103.2	183.1	208.0
CIS [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	57.5	62.0	116.1	127.2
CIS [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	13.2	13.0	26.3	26.9
CIS [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
CIS [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
CIS [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
CIS [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	115.9	127.6	246.8	262.9
CIS [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	26.7	36.0	50.9	70.1
CIS [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	11.7	13.1	23.1	24.6
CIS [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	2.4	1.5	4.7	4.5
BHVAC [Member]
Disaggregation of Revenue [Abstract]
Net sales	56.0	50.7	105.0	95.7
BHVAC [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	56.0	50.7	105.0	95.7
BHVAC [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	38.1	31.8	67.2	57.1
BHVAC [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	17.9	18.9	37.8	38.6
BHVAC [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	46.1	42.3	84.1	77.4
BHVAC [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	9.5	8.4	20.1	18.3
BHVAC [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.0	0.0	0.0	0.0
BHVAC [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	0.4	0.0	0.8	0.0
Total Segments [Member]
Disaggregation of Revenue [Abstract]
Net sales	512.0	564.5	1,056.3	1,146.2
Total Segments [Member] | Products Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	479.1	515.9	991.1	1,057.3
Total Segments [Member] | Products Transferred Over Time [Member]
Disaggregation of Revenue [Abstract]
Net sales	32.9	48.6	65.2	88.9
Total Segments [Member] | Americas [Member]
Disaggregation of Revenue [Abstract]
Net sales	269.0	294.2	548.5	575.2
Total Segments [Member] | Europe [Member]
Disaggregation of Revenue [Abstract]
Net sales	186.4	208.2	391.0	441.5
Total Segments [Member] | Asia [Member]
Disaggregation of Revenue [Abstract]
Net sales	56.6	62.1	116.8	129.5
Total Segments [Member] | Automotive [Member]
Disaggregation of Revenue [Abstract]
Net sales	135.1	136.4	264.3	281.5
Total Segments [Member] | Commercial Vehicle [Member]
Disaggregation of Revenue [Abstract]
Net sales	81.8	95.8	180.5	195.5
Total Segments [Member] | Off-Highway [Member]
Disaggregation of Revenue [Abstract]
Net sales	59.6	76.9	133.5	160.7
Total Segments [Member] | Commercial HVAC&R [Member]
Disaggregation of Revenue [Abstract]
Net sales	162.0	169.9	330.9	340.3
Total Segments [Member] | Data Center Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	36.2	44.4	71.0	88.4
Total Segments [Member] | Industrial Cooling [Member]
Disaggregation of Revenue [Abstract]
Net sales	11.7	13.1	23.1	24.6
Total Segments [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 25.6	$ 28.0	$ 53.0	$ 55.2