Segment and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013 Segment	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Number of reportable segments									5
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									$ 1,376.0	$ 1,577.2	$ 1,448.2
Gross profit	56.1	48.2	52.6	51.7	64.3	60.1	62.4	69.8	208.6	256.6	232.3
Gross profit (% of sales) (in hundredths)									15.20%	16.30%	16.00%
Operating (loss) income									(0.6)	67.5	42.9
Total assets	818.8				893.5				818.8	893.5
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									49.8	64.4	55.1
Total depreciation and amortization expense									55.8	57.7	56.5
Long-lived assets	382.8				430.3				382.8	430.3
Revenue from External Customer [Line Items]
Net sales									1,376.0	1,577.2	1,448.2
Modules/Packages [Member]
Revenue from External Customer [Line Items]
Net sales									358.5	410.4	406.9
Oil Coolers [Member]
Revenue from External Customer [Line Items]
Net sales									194.1	249.4	232.4
Radiators [Member]
Revenue from External Customer [Line Items]
Net sales									134.4	191.4	187.9
Charge-Air Coolers [Member]
Revenue from External Customer [Line Items]
Net sales									161.8	173.9	140.2
Building HVAC [Member]
Revenue from External Customer [Line Items]
Net sales									151.8	153.3	143.1
EGR Coolers [Member]
Revenue from External Customer [Line Items]
Net sales									136.1	152.7	130.9
Condensers [Member]
Revenue from External Customer [Line Items]
Net sales									128.8	101.5	63.0
Other [Member]
Revenue from External Customer [Line Items]
Net sales									110.5	144.6	143.8
Brazil [Member]
Segment Reporting Information, Additional Information [Abstract]
Net sales by geographic area									128.8	169.1	156.6
Germany [Member]
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	94.3				127.4				94.3	127.4
Net sales by geographic area									214.8	285.9	280.3
United States [Member]
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	115.1				114.7				115.1	114.7
Net sales by geographic area									637.4	666.2	632.3
Other [Member]
Segment Reporting Information, Additional Information [Abstract]
Long-lived assets	173.4				188.2				173.4	188.2
Net sales by geographic area									395.0	456.0	379.0
North America [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									564.5	602.0	573.2
Gross profit									81.4	89.7	79.3
Gross profit (% of sales) (in hundredths)									14.40%	14.90%	13.80%
Operating (loss) income									39.2	47.9	31.8
Total assets	218.3				232.9				218.3	232.9
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									19.0	15.4	12.9
Total depreciation and amortization expense									20.1	20.0	21.7
Europe [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									498.0	602.8	546.7
Gross profit									61.0	85.1	75.7
Gross profit (% of sales) (in hundredths)									12.30%	14.10%	13.80%
Operating (loss) income									(16.1)	37.3	28.3
Total assets	332.2				370.8				332.2	370.8
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									16.5	29.8	25.0
Total depreciation and amortization expense									23.4	26.5	25.5
South America [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									133.8	175.6	158.9
Gross profit									22.5	30.9	31.2
Gross profit (% of sales) (in hundredths)									16.80%	17.60%	19.70%
Operating (loss) income									11.2	10.4	13.0
Total assets	91.8				96.6				91.8	96.6
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									3.4	5.2	4.1
Total depreciation and amortization expense									3.7	4.1	4.0
Asia [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									59.5	84.1	63.9
Gross profit									1.7	7.9	5.2
Gross profit (% of sales) (in hundredths)									2.80%	9.40%	8.20%
Operating (loss) income									(8.8)	(2.5)	(3.1)
Total assets	91.3				102.6				91.3	102.6
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									7.8	12.5	10.8
Total depreciation and amortization expense									6.4	5.0	3.1
Commercial Products [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									139.3	142.2	126.3
Gross profit									40.8	42.5	39.3
Gross profit (% of sales) (in hundredths)									29.30%	29.90%	31.10%
Operating (loss) income									10.0	14.3	12.8
Total assets	73.7				68.9				73.7	68.9
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									3.1	1.7	2.3
Total depreciation and amortization expense									2.2	2.1	2.2
Total Segment [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									1,395.1	1,606.7	1,469.0
Gross profit									207.4	256.1	230.7
Gross profit (% of sales) (in hundredths)									14.90%	15.90%	15.70%
Operating (loss) income									35.5	107.4	82.8
Corporate and Eliminations [Member]
Net sales, gross profit, operating (loss) income and total assets by segment [Abstract]
Net sales									(19.1)	(29.5)	(20.8)
Gross profit									1.2	0.5	1.6
Gross profit (% of sales) (in hundredths)									0.00%	0.00%	0.00%
Operating (loss) income									(36.1)	(39.9)	(39.9)
Total assets	11.5				21.7				11.5	21.7
Segment Reporting Information, Additional Information [Abstract]
Total capital expenditures									$ 0	$ (0.2)	$ 0