CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 1,477.6	$ 1,376.0	$ 1,577.2
Cost of sales	1,239.4	1,167.4	1,320.6
Gross profit	238.2	208.6	256.6
Selling, general and administrative expenses	181.7	166.3	186.6
Restructuring expenses	16.1	17.0	0
Impairment charges	3.2	25.9	2.5
Operating income (loss)	37.2	(0.6)	67.5
Interest expense	(12.4)	(12.6)	(12.5)
Other (expense) income - net	(0.8)	0.2	(7.1)
Earnings (loss) from continuing operations before income taxes	24.0	(13.0)	47.9
Benefit (provision) for income taxes	107.9	(9.8)	(9.9)
Earnings (loss) from continuing operations	131.9	(22.8)	38.0
Earnings from discontinued operations, net of income taxes	0	0	0.8
Net earnings (loss)	131.9	(22.8)	38.8
Net earnings attributable to noncontrolling interest	(1.5)	(1.4)	(0.3)
Net earnings (loss) attributable to Modine	$ 130.4	$ (24.2)	$ 38.5
Earnings (loss) per share from continuing operations attributable to Modine shareholders:
Basic (in dollars per share)	$ 2.75	$ (0.52)	$ 0.81
Diluted (in dollars per share)	$ 2.72	$ (0.52)	$ 0.80
Net earnings (loss) per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 2.75	$ (0.52)	$ 0.83
Diluted (in dollars per share)	$ 2.72	$ (0.52)	$ 0.82
Weighted average shares outstanding:
Basic (in shares)	46.9	46.6	46.5
Diluted (in shares)	47.6	46.6	46.9