Earnings Per Share (Details) (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
Components of basic and diluted earnings per share [Abstract]
Net earnings (loss) attributable to Modine	$ (3.6)	$ (8.7)	$ 11.0	$ (22.1)
Less: Undistributed earnings attributable to unvested shares	0	0	(0.1)	0
Net earnings (loss) available to Modine shareholders	$ (3.6)	$ (8.7)	$ 10.9	$ (22.1)
Weighted average shares outstanding - basic (in shares)	46.9	46.7	46.8	46.6
Effect of dilutive securities (in shares)	0	0	0.7	0
Weighted average shares outstanding - diluted (in shares)	46.9	46.7	47.5	46.6
Net earnings (loss) per share - basic (in dollars per share)	$ (0.08)	$ (0.19)	$ 0.23	$ (0.47)
Net earnings (loss) per share - diluted (in dollars per share)	$ (0.08)	$ (0.19)	$ 0.23	$ (0.47)
Potential dilutive securities (in shares)	0.8	0.3		0.3
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earning per share (in shares)	0.5	1.2	0.7	1.2