Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Segment Reporting Information [Abstract]
Net sales	$ 346.1	$ 392.5
Gross profit	$ 57.0	$ 67.7
Gross profit as % of sales (in hundredths)	16.50%	17.20%
Operating income	$ 11.6	$ 24.1
Total assets	948.1		$ 931.6
Operating Segments [Member]
Segment Reporting Information [Abstract]
Net sales	350.9	396.9
Gross profit	$ 56.7	$ 67.3
Gross profit as % of sales (in hundredths)	16.20%	17.00%
Operating income	$ 17.5	$ 30.4
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Abstract]
Net sales	159.1	176.8
Gross profit	$ 26.7	$ 31.6
Gross profit as % of sales (in hundredths)	16.80%	17.90%
Operating income	$ 9.3	$ 15.9
Total assets	271.6		277.9
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Abstract]
Net sales	131.2	158.6
Gross profit	$ 15.1	$ 22.2
Gross profit as % of sales (in hundredths)	11.50%	14.00%
Operating income	$ 5.7	$ 10.4
Total assets	301.9		283.1
Operating Segments [Member] | Asia [Member]
Segment Reporting Information [Abstract]
Net sales	19.3	20.8
Gross profit	$ 3.5	$ 3.6
Gross profit as % of sales (in hundredths)	18.10%	17.20%
Operating income	$ 0.4	$ 0.9
Total assets	89.9		92.4
Operating Segments [Member] | Building HVAC [Member]
Segment Reporting Information [Abstract]
Net sales	41.3	40.7
Gross profit	$ 11.4	$ 9.9
Gross profit as % of sales (in hundredths)	27.70%	24.30%
Operating income	$ 2.1	$ 3.2
Total assets	149.2		131.4
Corporate and Eliminations [Member]
Segment Reporting Information [Abstract]
Net sales	(4.8)	(4.4)
Gross profit	$ 0.3	$ 0.4
Gross profit as % of sales (in hundredths)	0.00%	0.00%
Operating income	$ (5.9)	$ (6.3)
Total assets	$ 135.5		$ 146.8