CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 620.5	$ 578.8	$ 1,242.9	$ 1,119.8
Cost of sales	485.4	482.6	979.9	940.2
Gross profit	135.1	96.2	263.0	179.6
Selling, general and administrative expenses	68.9	58.8	130.3	115.1
Restructuring expenses	0.5	0.6	0.5	2.1
Operating income	65.7	36.8	132.2	62.4
Interest expense	(6.1)	(4.7)	(12.0)	(8.8)
Other income (expense) - net	0.1	(1.4)	(0.5)	(3.7)
Earnings before income taxes	59.7	30.7	119.7	49.9
Provision for income taxes	(12.8)	(6.4)	(27.5)	(11.3)
Net earnings	46.9	24.3	92.2	38.6
Net (earnings) loss attributable to noncontrolling interest	(0.4)	0.1	(0.9)	0.1
Net earnings attributable to Modine	$ 46.5	$ 24.4	$ 91.3	$ 38.7
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 0.89	$ 0.47	$ 1.74	$ 0.74
Diluted (in dollars per share)	$ 0.87	$ 0.46	$ 1.72	$ 0.74
Weighted-average shares outstanding:
Basic (in shares)	52.4	52.2	52.4	52.2
Diluted (in shares)	53.4	52.7	53.2	52.5