Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Components of basic and diluted earnings per share [Abstract]
Net earnings attributable to Modine	$ 8.6	$ 5.1
Less: Undistributed earnings attributable to unvested shares	(0.1)	(0.1)
Net earnings available to Modine shareholders	$ 8.5	$ 5.0
Weighted-average shares outstanding - basic (in shares)	46.9	47.3
Effect of dilutive securities (in shares)	0.3	0.5
Weighted-average shares outstanding - diluted (in shares)	47.2	47.8
Earnings per share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 0.18	$ 0.11
Net earnings per share - diluted (in dollars per share)	$ 0.18	$ 0.11
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)	1.1	0.9