CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings (loss)	$ 86.3	$ (209.5)	$ (2.0)
Other comprehensive income (loss):
Foreign currency translation	(8.3)	30.9	(19.2)
Defined benefit plans, net of income taxes of $0, $10.4 and ($8.3) million	19.7	30.1	(24.6)
Cash flow hedges, net of income taxes of $0, $0.6 and ($0.5) million	0.1	1.6	(1.5)
Total other comprehensive income (loss)	11.5	62.6	(45.3)
Comprehensive income (loss)	97.8	(146.9)	(47.3)
Comprehensive (income) loss attributable to noncontrolling interest	(0.9)	(1.7)	0.2
Comprehensive income (loss) attributable to Modine	$ 96.9	$ (148.6)	$ (47.1)