CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 658.0	$ 620.5	$ 1,319.5	$ 1,242.9
Cost of sales	492.4	485.4	991.3	979.9
Gross profit	165.6	135.1	328.2	263.0
Selling, general and administrative expenses	85.8	68.9	168.6	130.3
Restructuring expenses	4.5	0.5	9.9	0.5
Operating income	75.3	65.7	149.7	132.2
Interest expense	(7.4)	(6.1)	(14.9)	(12.0)
Other (expense) income - net	(1.5)	0.1	(1.8)	(0.5)
Earnings before income taxes	66.4	59.7	133.0	119.7
Provision for income taxes	(20.0)	(12.8)	(38.8)	(27.5)
Net earnings	46.4	46.9	94.2	92.2
Net earnings attributable to noncontrolling interest	(0.3)	(0.4)	(0.8)	(0.9)
Net earnings attributable to Modine	$ 46.1	$ 46.5	$ 93.4	$ 91.3
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 0.88	$ 0.89	$ 1.78	$ 1.74
Diluted (in dollars per share)	$ 0.86	$ 0.87	$ 1.73	$ 1.72
Weighted-average shares outstanding:
Basic (in shares)	52.6	52.4	52.5	52.4
Diluted (in shares)	53.9	53.4	53.9	53.2