v3.24.1.1.u2
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Basic Earnings Per Share [Abstract]      
Net earnings attributable to Modine $ 161.5 $ 153.1 $ 85.2
Weighted-average shares outstanding - basic (in shares) 52.4 52.3 52.0
Net earnings per share - basic (in dollars per share) $ 3.08 $ 2.93 $ 1.64
Diluted Earnings Per Share [Abstract]      
Net earnings attributable to Modine $ 161.5 $ 153.1 $ 85.2
Weighted-average shares outstanding - basic (in shares) 52.4 52.3 52.0
Effect of dilutive securities (in shares) 1.0 0.5 0.5
Weighted-average shares outstanding - diluted (in shares) 53.4 52.8 52.5
Net earnings per share - diluted (in dollars per share) $ 3.03 $ 2.9 $ 1.62
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]      
Antidilutive securities excluded from computation of earnings per share (in shares) 0.0    
Stock Options [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]      
Antidilutive securities excluded from computation of earnings per share (in shares)   0.5 0.5
Restricted Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]      
Antidilutive securities excluded from computation of earnings per share (in shares)   0.2 0.2