CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings (loss)	$ 131.9	$ (22.8)	$ 38.8
Other comprehensive income (loss):
Foreign currency translation	9.7	(17.1)	(22.6)
Defined benefit plans, net of income taxes of $9.8, $0 and $0 million	13.9	(23.6)	(41.4)
Cash flow hedges, net of income taxes of $0.6, $0 and $0.1 million	1.1	2.6	(3.4)
Total other comprehensive income (loss)	24.7	(38.1)	(67.4)
Comprehensive income (loss)	156.6	(60.9)	(28.6)
Comprehensive income attributable to noncontrolling interest	(1.7)	(1.4)	(0.3)
Comprehensive income (loss) attributable to Modine	$ 154.9	$ (62.3)	$ (28.9)