CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net (loss) earnings	$ (4.8)	$ 38.7	$ 3.4	$ 61.2
Other comprehensive income (loss):
Foreign currency translation	(19.5)	(5.4)	(17.7)	(30.5)
Defined benefit plans, net of income taxes of $0.3, $0.3, $0.6 and $0.6 million	1.1	1.0	2.2	2.0
Cash flow hedges, net of income taxes of $0.1, $0.2, $0.4 and $0.1 million	(0.2)	(0.5)	(1.0)	(0.1)
Total other comprehensive loss	(18.6)	(4.9)	(16.5)	(28.6)
Comprehensive (loss) income	(23.4)	33.8	(13.1)	32.6
Comprehensive loss (income) attributable to noncontrolling interest	0.3	(0.1)	0.2	(0.2)
Comprehensive (loss) income attributable to Modine	$ (23.1)	$ 33.7	$ (12.9)	$ 32.4