CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY In Millions, unless otherwise specified	Common stock [Member] USD ($)	Additional paid-in capital [Member] USD ($)	Retained earnings [Member] USD ($)	Accumulated other comprehensive loss [Member] USD ($)	Treasury stock, at cost [Member] USD ($)	Non-controlling interest [Member] USD ($)	Total USD ($)	Total KRW
Balance at Mar. 31, 2011	$ 29.4	$ 166.4	$ 193.3	$ (22.9)	$ (14.0)	$ 0	$ 352.2
Balance (in shares) at Mar. 31, 2011	47.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Modine	0	0	38.5	0	0	0	38.5
Other comprehensive (loss) income	0	0	0	(67.4)	0	0	(67.4)
Stock options and awards including related tax benefits	0.2	0.3	0	0	0	0	0.5
Stock options and awards including related tax benefits (in shares)	0.3
Purchase of treasury stock	0	0	0	0	(0.5)	0	(0.5)
Stock-based compensation expense	0	1.6	0	0	0	0	1.6
Contribution by noncontrolling interest	0	0	0	0	0	0.9	0.9	1,000.0
Net earnings attributable to noncontrolling interest	0	0	0	0	0	0.3	0.3
Balance at Mar. 31, 2012	29.6	168.3	231.8	(90.3)	(14.5)	1.2	326.1
Balance (in shares) at Mar. 31, 2012	47.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Modine	0	0	(24.2)	0	0	0	(24.2)
Other comprehensive (loss) income	0	0	0	(38.1)	0	0	(38.1)
Stock options and awards including related tax benefits	0.3	(0.2)	0	0	0	0	0.1
Stock options and awards including related tax benefits (in shares)	0.4
Purchase of treasury stock	0	0	0	0	(0.1)	0	(0.1)
Stock-based compensation expense	0	3.1	0	0	0	0	3.1
Net earnings attributable to noncontrolling interest	0	0	0	0	0	1.4	1.4
Balance at Mar. 31, 2013	29.9	171.2	207.6	(128.4)	(14.6)	2.6	268.3
Balance (in shares) at Mar. 31, 2013	47.8						47.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Modine	0	0	130.4	0	0	0	130.4
Other comprehensive (loss) income	0	0	0	24.5	0	0.2	24.7
Stock options and awards including related tax benefits	0.3	0.9	0	0	0	0	1.2
Stock options and awards including related tax benefits (in shares)	0.5
Purchase of treasury stock	0	0	0	0	(0.6)	0	(0.6)
Stock-based compensation expense	0	3.6	0	0	0	0	3.6
Dividend paid to noncontrolling interest	0	0	0	0	0	(0.5)	(0.5)
Net earnings attributable to noncontrolling interest	0	0	0	0	0	1.5	1.5
Balance at Mar. 31, 2014	$ 30.2	$ 175.7	$ 338.0	$ (103.9)	$ (15.2)	$ 3.8	$ 428.6
Balance (in shares) at Mar. 31, 2014	48.3						48.3