CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings (loss)	$ 1.9	$ 8.2	$ 6.8	$ (8.8)
Other comprehensive income (loss):
Foreign currency translation	(14.8)	(6.2)	(17.7)	(6.1)
Defined benefit plans, net of income taxes of $0.4, $1.7, $1.3 and $14.3 million	0.9	2.9	2.6	23.3
Total other comprehensive income (loss)	(13.9)	(3.3)	(15.1)	17.2
Comprehensive income (loss)	(12.0)	4.9	(8.3)	8.4
Comprehensive (income) loss attributable to noncontrolling interest	0.4	0.0	(0.1)	(0.1)
Comprehensive income (loss) attributable to Modine	$ (11.6)	$ 4.9	$ (8.4)	$ 8.3