CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) [Abstract]
Net earnings (loss)	$ 5.0	$ (11.9)	$ 15.6	$ (12.8)
Other comprehensive income (loss):
Foreign currency translation	10.2	5.2	5.9	(13.8)
Defined benefit plans	1.2	0.8	2.5	1.8
Cash flow hedges	0.1	0.9	0.2	1.7
Total other comprehensive income (loss)	11.5	6.9	8.6	(10.3)
Comprehensive income (loss)	16.5	(5.0)	24.2	(23.1)
Comprehensive income attributable to noncontrolling interest	(0.4)	(0.3)	(1.0)	(0.6)
Comprehensive income (loss) attributable to Modine	$ 16.1	$ (5.3)	$ 23.2	$ (23.7)