CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 561.4	$ 560.0	$ 1,804.3	$ 1,679.8
Cost of sales	434.1	462.4	1,414.0	1,402.6
Gross profit	127.3	97.6	390.3	277.2
Selling, general and administrative expenses	68.0	58.0	198.3	173.1
Restructuring expenses	1.6	0.1	2.1	2.2
Gain on sale of assets	(4.0)	0.0	(4.0)	0.0
Operating income	61.7	39.5	193.9	101.9
Interest expense	(5.8)	(5.9)	(17.8)	(14.7)
Other expense - net	(0.5)	(0.4)	(1.0)	(4.1)
Earnings before income taxes	55.4	33.2	175.1	83.1
Provision for income taxes	(10.3)	(8.5)	(37.8)	(19.8)
Net earnings	45.1	24.7	137.3	63.3
Net earnings attributable to noncontrolling interest	(0.7)	(0.2)	(1.6)	(0.1)
Net earnings attributable to Modine	$ 44.4	$ 24.5	$ 135.7	$ 63.2
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 0.85	$ 0.47	$ 2.59	$ 1.21
Diluted (in dollars per share)	$ 0.83	$ 0.46	$ 2.55	$ 1.2
Weighted-average shares outstanding:
Basic (in shares)	52.3	52.3	52.4	52.2
Diluted (in shares)	53.2	52.9	53.2	52.7