Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Components of basic and diluted earnings per share [Abstract]
Net earnings attributable to Modine	$ 5.1	$ 13.7
Less: Undistributed earnings attributable to unvested shares	(0.1)	(0.2)
Net earnings available to Modine shareholders	$ 5.0	$ 13.5
Weighted average shares outstanding - basic (in shares)	47.3	47.0
Effect of dilutive securities (in shares)	0.5	0.7
Weighted average shares outstanding - diluted (in shares)	47.8	47.7
Earnings per share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 0.11	$ 0.29
Net earnings per share - diluted (in dollars per share)	$ 0.11	$ 0.28
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)	0.9	0.6