Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net earnings attributable to Modine	$ 44.4	$ 24.5	$ 135.7	$ 63.2
Weighted-average shares outstanding - basic (in shares)	52.3	52.3	52.4	52.2
Effect of dilutive securities (in shares)	0.9	0.6	0.8	0.5
Weighted-average shares outstanding - diluted (in shares)	53.2	52.9	53.2	52.7
Earnings per Share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 0.85	$ 0.47	$ 2.59	$ 1.21
Net earnings per share - diluted (in dollars per share)	$ 0.83	$ 0.46	$ 2.55	$ 1.2
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	0.0		0.0
Stock Options [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		0.1		0.6
Restricted Stock [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)				0.2
Restricted Stock [Member] | Maximum [Member]
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		0.1