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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings (loss)	$ 23.8	$ 14.9	$ (1.0)
Other comprehensive income (loss):
Foreign currency translation	41.8	(10.8)	4.6
Defined benefit plans, net of income taxes of $(0.2), $1.7 and $11.8 million	0.1	3.2	19.7
Cash flow hedges, net of income taxes of $0.1, $0 and $0 million	0.1	0.0	0.0
Total other comprehensive income (loss)	42.0	(7.6)	24.3
Comprehensive income (loss)	65.8	7.3	23.3
Comprehensive income attributable to noncontrolling interest	(2.1)	(0.7)	(0.5)
Comprehensive income attributable to Modine	$ 63.7	$ 6.6	$ 22.8

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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