Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net earnings attributable to Modine	$ 44.8	$ 14.3
Weighted-average shares outstanding - basic (in shares)	52.3	52.2
Effect of dilutive securities (in shares)	0.7	0.2
Weighted-average shares outstanding - diluted (in shares)	53.0	52.4
Earnings per Share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 0.86	$ 0.27
Net earnings per share - diluted (in dollars per share)	$ 0.85	$ 0.27
Stock Options [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		0.9
Restricted Stock [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	0.1	0.5