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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Components of basic and diluted earnings per share [Abstract]        
Earnings (loss) from continuing operations $ 8.2 $ 9.1 $ (8.8) $ 25.2
Less: Net earnings attributable to noncontrolling interest 0.0 (0.1) (0.4) (0.8)
Less: Undistributed earnings attributable to unvested shares (0.2) (0.1) 0.0 (0.3)
Earnings (loss) from continuing operations available to Modine shareholders 8.0 8.9 (9.2) 24.1
Earnings from discontinued operations, net of income taxes 0.0 0.6 0.0 0.6
Net earnings (loss) available to Modine shareholders $ 8.0 $ 9.5 $ (9.2) $ 24.7
Weighted-average shares outstanding - basic (in shares) 47.4 47.2 47.4 47.2
Effect of dilutive securities (in shares) 0.4 0.5 0.0 0.5
Weighted-average shares outstanding - diluted (in shares) 47.8 47.7 47.4 47.7
Basic Earnings Per Share [Abstract]        
Earnings (loss) per share - continuing operations (in dollars per share) $ 0.17 $ 0.19 $ (0.19) $ 0.51
Earnings per share - discontinued operations (in dollars per share) 0 0.01 0 0.01
Net earnings (loss) per share - basic (in dollars per share) 0.17 0.20 (0.19) 0.52
Diluted Earnings Per Share [Abstract]        
Earnings (loss) per share - continuing operations (in dollars per share) 0.17 0.19 (0.19) 0.51
Earnings per share - discontinued operations (in dollars per share) 0 0.01 0 0.01
Net earnings (loss) per share - diluted (in dollars per share) $ 0.17 $ 0.20 $ (0.19) $ 0.52
Potential dilutive securities (in shares)     0.4  
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) 1.0 0.9 0.9 0.7