CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 578.8	$ 478.9	$ 1,119.8	$ 973.5
Cost of sales	482.6	412.6	940.2	834.0
Gross profit	96.2	66.3	179.6	139.5
Selling, general and administrative expenses	58.8	51.9	115.1	111.3
Restructuring expenses	0.6	0.6	2.1	0.9
Impairment charges - net	0.0	3.3	0.0	1.5
Loss on sale of assets	0.0	0.0	0.0	6.6
Operating income	36.8	10.5	62.4	19.2
Interest expense	(4.7)	(3.8)	(8.8)	(8.0)
Other expense - net	(1.4)	(0.7)	(3.7)	(0.5)
Earnings before income taxes	30.7	6.0	49.9	10.7
Provision for income taxes	(6.4)	(5.4)	(11.3)	(7.3)
Net earnings	24.3	0.6	38.6	3.4
Net loss (earnings) attributable to noncontrolling interest	0.1	(0.2)	0.1	(0.7)
Net earnings attributable to Modine	$ 24.4	$ 0.4	$ 38.7	$ 2.7
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 0.47	$ 0.01	$ 0.74	$ 0.05
Diluted (in dollars per share)	$ 0.46	$ 0.01	$ 0.74	$ 0.05
Weighted-average shares outstanding:
Basic (in shares)	52.2	52.0	52.2	51.9
Diluted (in shares)	52.7	52.6	52.5	52.5