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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]      
Net earnings $ 163.4 $ 153.6 $ 86.3
Other comprehensive income (loss):      
Foreign currency translation (5.6) (18.9) (8.3)
Defined benefit plans, net of income taxes of $1.6, $1.1 and $0 million 3.7 6.7 19.7
Cash flow hedges, net of income taxes of ($0.2), $0 and $0 million (0.7) 0.1 0.1
Total other comprehensive income (loss) (2.6) (12.1) 11.5
Comprehensive income 160.8 141.5 97.8
Comprehensive income attributable to noncontrolling interest (1.6) 0.0 (0.9)
Comprehensive income attributable to Modine $ 159.2 $ 141.5 $ 96.9