v3.26.1
Segment and Geographic Information, Net Sales, Significant Expenses by Segment (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Segment Information      
Net sales $ 3,181.1 $ 2,583.5 $ 2,407.8
Cost of sales 2,450.0 1,939.7 1,882.2
Gross profit 731.1 643.8 525.6
Selling, general and administrative expenses 360.1 332.1 273.9
Restructuring expenses 20.6 28.2 15.0
Impairment charge 4.1 0.0 0.0
Loss (gain) on sale of assets 3.9 0.0 (4.0)
Operating income 342.4 283.5 240.7
Climate Solutions      
Segment Information      
Net sales 2,055.4 1,440.6 1,108.1
Proposed Performance Technologies Transaction      
Segment Information      
Net sales 1,125.7 1,142.9 1,299.7
Operating Segments      
Segment Information      
Net sales 3,194.1 2,604.3 2,429.4
Operating Segments | Climate Solutions      
Segment Information      
Net sales 2,062.3 1,440.8 1,108.1
Cost of sales 1,538.3 1,024.7 811.2
Gross profit 524.0 416.1 296.9
Selling, general and administrative expenses 194.4 161.7 115.3
Restructuring expenses 8.5 6.0 3.0
Operating income 321.1 248.4 178.6
Operating Segments | Proposed Performance Technologies Transaction      
Segment Information      
Net sales 1,131.8 1,163.5 1,321.3
Cost of sales 927.0 933.1 1,091.7
Gross profit 204.8 230.4 229.6
Selling, general and administrative expenses 79.1 101.9 105.9
Restructuring expenses 11.9 20.5 12.0
Impairment charge 4.1    
Operating income 109.7 108.0 111.7
Inter-segment sales      
Segment Information      
Net sales 13.0 20.8 21.6
Inter-segment sales | Climate Solutions      
Segment Information      
Net sales 6.9 0.2 0.0
Inter-segment sales | Proposed Performance Technologies Transaction      
Segment Information      
Net sales 6.1 20.6 21.6
Corporate and eliminations      
Segment Information      
Net sales (13.0) (20.8) (21.6)
Cost of sales (15.3) (18.1) (20.7)
Gross profit 2.3 (2.7) (0.9)
Selling, general and administrative expenses 86.6 68.5 52.7
Restructuring expenses 0.2 1.7  
Loss (gain) on sale of assets 3.9   (4.0)
Operating income $ (88.4) $ (72.9) $ (49.6)