Segment Information - Summary of segment assets (Details) - USD ($) $ in Millions		Jun. 30, 2025	Mar. 31, 2025
Segment Information
Total assets		$ 2,228.5	$ 1,917.6
Other
Segment Information
Total assets	[1]	1,277.1	1,097.8
Operating segments | Climate Solutions
Segment Information
Total assets		585.4	448.7
Operating segments | Performance Technologies
Segment Information
Total assets		$ 366.0	$ 371.1

[1] Represents cash and cash equivalents, other current assets, property plant and equipment, intangible assets, goodwill, deferred income taxes, and other noncurrent assets for the Climate Solutions and Performance Technologies segments and Corporate.