CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Net sales	$ 347.0	$ 326.1	$ 1,087.0	$ 1,016.4
Cost of sales	290.2	277.9	911.1	863.9
Gross profit	56.8	48.2	175.9	152.5
Selling, general and administrative expenses	44.5	42.3	132.9	126.8
Restructuring expenses	9.4	1.4	10.5	7.3
Impairment charges	2.0	8.3	2.0	25.1
Operating income (loss)	0.9	(3.8)	30.5	(6.7)
Interest expense	(3.2)	(2.8)	(9.4)	(9.2)
Other expense - net	(0.3)	(0.3)	(0.8)	0
Earnings (loss) before income taxes	(2.6)	(6.9)	20.3	(15.9)
Provision for income taxes	(0.8)	(1.5)	(8.1)	(5.3)
Net earnings (loss)	(3.4)	(8.4)	12.2	(21.2)
Net earnings attributable to noncontrolling interest	(0.2)	(0.3)	(1.2)	(0.9)
Net earnings (loss) attributable to Modine	$ (3.6)	$ (8.7)	$ 11.0	$ (22.1)
Net earnings (loss) per share attributable to Modine shareholders:
Basic (in dollars per share)	$ (0.08)	$ (0.19)	$ 0.23	$ (0.47)
Diluted (in dollars per share)	$ (0.08)	$ (0.19)	$ 0.23	$ (0.47)
Weighted average shares outstanding:
Basic (in shares)	46.9	46.7	46.8	46.6
Diluted (in shares)	46.9	46.7	47.5	46.6