CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Accumulated other comprehensive loss [Member]	Treasury stock, at cost [Member]	Non-controlling interest [Member]	Total
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
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Modine	0	0	21.8	0	0	0	21.8
Other comprehensive (loss) income	0	0	0	(94.7)	0	(0.2)	(94.9)
Stock options and awards including related tax benefits	0.2	0.9	0	0	0	0	1.1
Stock options and awards including related tax benefits (in shares)	0.3
Purchase of treasury stock	0	0	0	0	(1.0)	0	(1.0)
Stock-based compensation expense	0	4.0	0	0	0	0	4.0
Net earnings attributable to noncontrolling interest	0	0	0	0	0	1.0	1.0
Balance at Mar. 31, 2015	$ 30.4	$ 180.6	$ 359.8	$ (198.6)	$ (16.2)	$ 4.6	$ 360.6
Balance (in shares) at Mar. 31, 2015	48.6						48.6