CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings	$ 8.2	$ 22.5
Other comprehensive income (loss):
Foreign currency translation	1.8	(25.1)
Defined benefit plans, net of income taxes	1.1	1.0
Cash flow hedges, net of income taxes	(0.8)	0.4
Total other comprehensive income (loss)	2.1	(23.7)
Comprehensive income (loss)	10.3	(1.2)
Comprehensive income attributable to noncontrolling interest	(0.1)	(0.1)
Comprehensive income (loss) attributable to Modine	$ 10.2	$ (1.3)