CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings	$ 1.0	$ 18.3	$ 4.4	$ 79.5
Other comprehensive income (loss):
Foreign currency translation	14.0	(2.1)	(3.7)	(32.6)
Defined benefit plans, net of income taxes of $0.4, $0.3, $1.0 and $0.9 million	1.0	1.0	3.2	3.0
Cash flow hedges, net of income taxes of $0.2, ($0.2), ($0.2) and ($0.3) million	0.6	(0.9)	(0.4)	(1.0)
Total other comprehensive income (loss)	15.6	(2.0)	(0.9)	(30.6)
Comprehensive income	16.6	16.3	3.5	48.9
Comprehensive (income) loss attributable to noncontrolling interest	0.0	(0.3)	0.2	(0.5)
Comprehensive income attributable to Modine	$ 16.6	$ 16.0	$ 3.7	$ 48.4