v3.26.3
Business Segments - Schedule of Financial Information by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]    
Net sales $ 798.2 $ 733.7
Cost of sales 541.9 517.3
Operating income 196.4 153.3
Interest expense, net 7.1 11.5
Other income, net (3.1) (3.0)
Income before income taxes 192.4 144.8
Intersegment    
Segment Reporting [Line Items]    
Net sales (23.3) (19.5)
Operating income (1.1) (0.2)
Operating    
Segment Reporting [Line Items]    
Net sales 821.5 753.2
Cost of sales 564.1 536.8
Other segment items 33.8 36.3
Operating income 223.6 180.1
Corporate    
Segment Reporting [Line Items]    
Operating income (26.1) (26.6)
Specialty Alloys Operations    
Segment Reporting [Line Items]    
Net sales 724.1 656.1
Specialty Alloys Operations | Intersegment    
Segment Reporting [Line Items]    
Net sales (6.3) (3.5)
Specialty Alloys Operations | Operating    
Segment Reporting [Line Items]    
Net sales 730.4 659.6
Cost of sales 485.5 458.0
Other segment items 28.6 30.9
Operating income 216.3 170.7
Performance Engineered Products    
Segment Reporting [Line Items]    
Net sales 74.1 77.6
Performance Engineered Products | Intersegment    
Segment Reporting [Line Items]    
Net sales (17.0) (16.0)
Performance Engineered Products | Operating    
Segment Reporting [Line Items]    
Net sales 91.1 93.6
Cost of sales 78.6 78.8
Other segment items 5.2 5.4
Operating income $ 7.3 $ 9.4