Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share
Net earnings attributable to Modine	$ 51.2	$ 47.3
Weighted-average shares outstanding - basic (in shares)	52.6	52.5
Effect of dilutive securities	1.1	1.4
Weighted-average shares outstanding - diluted (in shares)	53.7	53.9
Earnings per Share [Abstract]
Net earnings per share - basic (in dollars per share)	$ 0.97	$ 0.9
Net earnings per share - diluted (in dollars per share)	$ 0.95	$ 0.88
Anti-dilutive, Securities	0.0	0.0