Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Basic Earnings Per Share [Abstract]
(Loss) earnings from continuing operations	$ (8.4)	$ 8.8	$ (21.2)	$ 22.3
Less: Net earnings attributable to noncontrolling interest	(0.3)	(0.1)	(0.9)	(0.1)
(Loss) earnings from continuing operations attributable to Modine	(8.7)	8.7	(22.1)	22.2
Less: Undistributed earnings attributable to unvested shares	0	0	0	(0.1)
(Loss) earnings from continuing operations available to Modine shareholders	(8.7)	8.7	(22.1)	22.1
Earnings from discontinued operations	0	0.3	0	0.7
Less: Undistributed earnings attributable to unvested shares	0	0	0	0
Earnings from discontinued operations available to Modine shareholders	0	0.3	0	0.7
Net (loss) earnings available to Modine shareholders	(8.7)	9.0	(22.1)	22.8
Weighted average shares outstanding - basic (in shares)	46.7	46.5	46.6	46.5
(Loss) earnings per share - continuing operations (in dollars per share)	$ (0.19)	$ 0.18	$ (0.47)	$ 0.47
Earnings per share - discontinued operations (in dollars per share)	$ 0	$ 0.01	$ 0	$ 0.02
Net (loss) earnings per share - basic (in dollars per share)	$ (0.19)	$ 0.19	$ (0.47)	$ 0.49
Diluted Earnings Per Share [Abstract]
(Loss) earnings from continuing operations	(8.4)	8.8	(21.2)	22.3
Less: Net earnings attributable to noncontrolling interest	(0.3)	(0.1)	(0.9)	(0.1)
(Loss) earnings from continuing operations attributable to Modine	(8.7)	8.7	(22.1)	22.2
Less: Undistributed earnings attributable to unvested shares	0	0	0	(0.1)
(Loss) earnings from continuing operations available to Modine shareholders	(8.7)	8.7	(22.1)	22.1
Earnings from discontinued operations	0	0.3	0	0.7
Less: Undistributed earnings attributable to unvested shares	0	0	0	0
Earnings from discontinued operations available to Modine shareholders	0	0.3	0	0.7
Net (loss) earnings available to Modine shareholders	$ (8.7)	$ 9.0	$ (22.1)	$ 22.8
Weighted average shares outstanding - basic (in shares)	46.7	46.5	46.6	46.5
Effect of dilutive securities (in shares)	0	0.3	0	0.4
Weighted average shares outstanding - diluted (in shares)	46.7	46.8	46.6	46.9
(Loss) earnings per share - continuing operations (in dollars per share)	$ (0.19)	$ 0.18	$ (0.47)	$ 0.47
Earnings per share - discontinued operations (in dollars per share)	$ 0	$ 0.01	$ 0	$ 0.02
Net (loss) earnings per share - diluted (in dollars per share)	$ (0.19)	$ 0.19	$ (0.47)	$ 0.49
Potential dilutive securities (in shares)	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)	1.2	1.4	1.2	1.4
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earning per share (in shares)	0.2	0.2	0.2	0.2