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Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Segment Reporting Information [Abstract]
Net sales	$ 347.8	$ 529.0
Gross profit	$ 46.1	$ 83.4
Gross profit (% of sales)	13.30%	15.80%
Operating income	$ (3.2)	$ 18.1
Total assets	1,516.7		$ 1,536.1
CIS [Member]
Segment Reporting Information [Abstract]
Net sales	122.5	168.8
BHVAC [Member]
Segment Reporting Information [Abstract]
Net sales	47.6	49.0
HDE [Member]
Segment Reporting Information [Abstract]
Net sales	123.5	216.4
Automotive [Member]
Segment Reporting Information [Abstract]
Net sales	62.1	113.6
Total Segments [Member]
Segment Reporting Information [Abstract]
Net sales	355.7	547.8
Operating Segments [Member]
Segment Reporting Information [Abstract]
Net sales	347.8	529.0
Gross profit	$ 46.1	$ 83.0
Gross profit (% of sales)	13.00%	15.20%
Operating income	$ 0.8	$ 31.6
Operating Segments [Member] | CIS [Member]
Segment Reporting Information [Abstract]
Net sales	121.3	167.9
Gross profit	$ 15.5	$ 24.3
Gross profit (% of sales)	12.60%	14.40%
Operating income	$ 0.0	$ 9.0
Total assets	600.4		617.7
Operating Segments [Member] | BHVAC [Member]
Segment Reporting Information [Abstract]
Net sales	47.4	48.5
Gross profit	$ 14.5	$ 13.7
Gross profit (% of sales)	30.50%	27.90%
Operating income	$ 7.1	$ 5.3
Total assets	109.2		102.3
Operating Segments [Member] | HDE [Member]
Segment Reporting Information [Abstract]
Net sales	118.3	199.7
Gross profit	$ 11.3	$ 32.5
Gross profit (% of sales)	9.20%	15.00%
Operating income	$ (2.5)	$ 17.3
Total assets	427.5		417.4
Operating Segments [Member] | Automotive [Member]
Segment Reporting Information [Abstract]
Net sales	60.8	112.9
Gross profit	$ 4.8	$ 12.5
Gross profit (% of sales)	7.70%	11.00%
Operating income	$ (3.8)	$ 0.0
Total assets	270.2		272.5
Corporate and Eliminations [Member]
Segment Reporting Information [Abstract]
Net sales	(7.9)	(18.8)
Gross profit	$ 0.0	$ 0.4
Gross profit (% of sales)	0.00%	0.00%
Operating income	$ (4.0)	$ (13.5)
Total assets	109.4		$ 126.2
Inter-segment Sales [Member]
Segment Reporting Information [Abstract]
Net sales	7.9	18.8
Inter-segment Sales [Member] | CIS [Member]
Segment Reporting Information [Abstract]
Net sales	1.2	0.9
Inter-segment Sales [Member] | BHVAC [Member]
Segment Reporting Information [Abstract]
Net sales	0.2	0.5
Inter-segment Sales [Member] | HDE [Member]
Segment Reporting Information [Abstract]
Net sales	5.2	16.7
Inter-segment Sales [Member] | Automotive [Member]
Segment Reporting Information [Abstract]
Net sales	$ 1.3	$ 0.7

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