CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 326.1	$ 373.3	$ 1,016.4	$ 1,188.4
Cost of sales	277.9	313.2	863.9	996.1
Gross profit	48.2	60.1	152.5	192.3
Selling, general and administrative expenses	42.3	40.7	126.8	140.4
Impairment charges	8.3	2.2	25.1	2.2
Restructuring and repositioning expenses	1.4	0	7.3	0
Operating (loss) income	(3.8)	17.2	(6.7)	49.7
Interest expense	(2.8)	(2.9)	(9.2)	(9.2)
Other expense - net	(0.3)	(1.6)	0	(7.6)
(Loss) earnings from continuing operations before income taxes	(6.9)	12.7	(15.9)	32.9
Provision for income taxes	(1.5)	(3.9)	(5.3)	(10.6)
(Loss) earnings from continuing operations	(8.4)	8.8	(21.2)	22.3
Earnings from discontinued operations, net of income taxes	0	0.3	0	0.7
Net (loss) earnings	(8.4)	9.1	(21.2)	23.0
Less: Net earnings attributable to noncontrolling interest	(0.3)	(0.1)	(0.9)	(0.1)
Net (loss) earnings attributable to Modine	$ (8.7)	$ 9.0	$ (22.1)	$ 22.9
(Loss) earnings per share from continuing operations attributable to Modine shareholders:
Basic (in dollars per share)	$ (0.19)	$ 0.18	$ (0.47)	$ 0.47
Diluted (in dollars per share)	$ (0.19)	$ 0.18	$ (0.47)	$ 0.47
Net (loss) earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ (0.19)	$ 0.19	$ (0.47)	$ 0.49
Diluted (in dollars per share)	$ (0.19)	$ 0.19	$ (0.47)	$ 0.49
Weighted average shares outstanding:
Basic (in shares)	46.7	46.5	46.6	46.5
Diluted (in shares)	46.7	46.8	46.6	46.9