Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	$ 326.1	$ 373.3	$ 1,016.4	$ 1,188.4
Gross profit	48.2	60.1	152.5	192.3
Gross profit as percentage of sales	14.80%	16.10%	15.00%	16.20%
Operating income (loss)	(3.8)	17.2	(6.7)	49.7
Total assets	799.6		799.6		893.5
North America [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	128.2	139.2	425.2	444.7
Gross profit	17.3	19.1	59.4	62.7
Gross profit as percentage of sales	13.50%	13.70%	14.00%	14.10%
Operating income (loss)	8.2	10.6	28.9	32.4
Total assets	209.2		209.2		232.9
Europe [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	115.7	139.9	359.9	458.7
Gross profit	12.1	18.7	44.7	64.4
Gross profit as percentage of sales	10.40%	13.40%	12.40%	14.00%
Operating income (loss)	(5.7)	6.8	(15.8)	26.8
Total assets	320.3		320.3		370.8
South America [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	31.7	42.2	97.1	138.2
Gross profit	5.6	7.8	16.1	25.7
Gross profit as percentage of sales	17.50%	18.60%	16.50%	18.60%
Operating income (loss)	2.6	4.0	7.6	9.8
Total assets	84.5		84.5		96.6
Asia [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	13.2	20.9	42.8	62.1
Gross profit	0	1.3	0.5	6.2
Gross profit as percentage of sales	0.20%	6.20%	1.10%	10.00%
Operating income (loss)	(2.5)	(1.5)	(7.1)	(1.4)
Total assets	89.4		89.4		102.6
Commercial Products [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	41.3	39.3	105.3	108.5
Gross profit	13.1	13.0	31.1	32.7
Gross profit as percentage of sales	31.60%	33.00%	29.50%	30.20%
Operating income (loss)	4.7	5.8	8.3	12.1
Total assets	80.4		80.4		68.9
Corporate and eliminations [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	(4.0)	(8.2)	(13.9)	(23.8)
Gross profit	0.1	0.2	0.7	0.6
Gross profit as percentage of sales	0.00%	0.00%	0.00%	0.00%
Operating income (loss)	(11.1)	(8.5)	(28.6)	(30.0)
Total assets	15.8		15.8		21.7
Segment total [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Net sales	330.1	381.5	1,030.3	1,212.2
Gross profit	48.1	59.9	151.8	191.7
Gross profit as percentage of sales	14.60%	15.70%	14.70%	15.80%
Operating income (loss)	$ 7.3	$ 25.7	$ 21.9	$ 79.7