CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings	$ 85.9	$ 23.8	$ 14.9
Other comprehensive income (loss):
Foreign currency translation	(37.6)	41.8	(10.8)
Defined benefit plans, net of income taxes of ($0.3), ($0.2) and $1.7 million	(1.4)	0.1	3.2
Cash flow hedges, net of income taxes of $0.1, $0.1 and $0 million	0.4	0.1	0.0
Total other comprehensive income (loss)	(38.6)	42.0	(7.6)
Comprehensive income	47.3	65.8	7.3
Comprehensive income attributable to noncontrolling interest	(0.6)	(2.1)	(0.7)
Comprehensive income attributable to Modine	$ 46.7	$ 63.7	$ 6.6