CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 2,583.5	$ 2,407.8	$ 2,297.9
Cost of sales	1,939.7	1,882.2	1,908.5
Gross profit	643.8	525.6	389.4
Selling, general and administrative expenses	332.1	273.9	234.0
Restructuring expenses	28.2	15.0	5.0
Gain on sale of assets	0.0	(4.0)	0.0
Operating income	283.5	240.7	150.4
Interest expense	(26.4)	(24.1)	(20.7)
Other expense - net	(3.1)	(2.0)	(4.4)
Earnings before income taxes	254.0	214.6	125.3
(Provision) benefit for income taxes	(68.5)	(51.2)	28.3
Net earnings	185.5	163.4	153.6
Net earnings attributable to noncontrolling interest	(1.5)	(1.9)	(0.5)
Net earnings attributable to Modine	$ 184.0	$ 161.5	$ 153.1
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 3.50	$ 3.08	$ 2.93
Diluted (in dollars per share)	$ 3.42	$ 3.03	$ 2.90
Weighted-average shares outstanding:
Basic (in shares)	52.6	52.4	52.3
Diluted (in shares)	53.9	53.4	52.8