Property, Plant and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2025	Mar. 31, 2025
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 1,387.0	$ 1,279.9
Less: accumulated depreciation	(907.4)	(889.4)
Net property, plant and equipment	479.6	390.5
Land
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	19.3	16.4
Buildings and improvements
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 285.7	257.7
Buildings and improvements \| Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	10 years
Buildings and improvements \| Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	40 years
Machinery and equipment
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 894.2	843.7
Machinery and equipment \| Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	3 years
Machinery and equipment \| Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	15 years
Office equipment
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 95.9	92.6
Office equipment \| Minimum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	3 years
Office equipment \| Maximum
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Useful life	10 years
Construction in progress
Property, Plant and Equipment [Abstract]
Property, plant and equipment, Gross	$ 91.9	$ 69.5

MODINE MANUFACTURING CO 10-Q