CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 529.0	$ 566.1
Cost of sales	445.6	471.8
Gross profit	83.4	94.3
Selling, general and administrative expenses	63.5	59.3
Restructuring expenses	1.8	0.2
Operating income	18.1	34.8
Interest expense	(5.9)	(6.2)
Other expense - net	(1.1)	(1.1)
Earnings before income taxes	11.1	27.5
Provision for income taxes	(2.9)	(5.0)
Net earnings	8.2	22.5
Net earnings attributable to noncontrolling interest	(0.2)	(0.5)
Net earnings attributable to Modine	$ 8.0	$ 22.0
Net earnings per share attributable to Modine shareholders:
Basic (in dollars per share)	$ 0.16	$ 0.43
Diluted (in dollars per share)	$ 0.16	$ 0.43
Weighted-average shares outstanding:
Basic (in shares)	50.7	50.3
Diluted (in shares)	51.1	51.2