v3.26.3
Revenue - Schedule of Revenues by End-Use Markets and Geography (Details) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]    
Total net sales $ 798.2 $ 733.7
Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 821.5 753.2
Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (23.3) (19.5)
United States    
Disaggregation of Revenue [Line Items]    
Total net sales 464.6 432.4
United States | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (11.7) (6.1)
Europe    
Disaggregation of Revenue [Line Items]    
Total net sales 155.5 166.2
Europe | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (3.9) (3.8)
Asia Pacific    
Disaggregation of Revenue [Line Items]    
Total net sales 101.3 83.1
Asia Pacific | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (7.7) (9.6)
Mexico    
Disaggregation of Revenue [Line Items]    
Total net sales 48.8 24.8
Mexico | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales 0.0 0.1
Canada    
Disaggregation of Revenue [Line Items]    
Total net sales 17.4 14.4
Canada | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales 0.0 0.0
Other    
Disaggregation of Revenue [Line Items]    
Total net sales 10.6 12.8
Other | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales 0.0 (0.1)
Aerospace and Defense    
Disaggregation of Revenue [Line Items]    
Total net sales 534.6 470.9
Aerospace and Defense | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (1.5) (2.2)
Medical    
Disaggregation of Revenue [Line Items]    
Total net sales 65.5 74.5
Medical | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (15.3) (14.6)
Energy    
Disaggregation of Revenue [Line Items]    
Total net sales 46.5 54.7
Energy | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales 0.0 0.0
Transportation    
Disaggregation of Revenue [Line Items]    
Total net sales 26.8 22.8
Transportation | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (0.1) 0.0
Industrial and Consumer    
Disaggregation of Revenue [Line Items]    
Total net sales 102.7 92.9
Industrial and Consumer | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (6.3) (2.7)
Distribution    
Disaggregation of Revenue [Line Items]    
Total net sales 22.1 17.9
Distribution | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (0.1) 0.0
Specialty Alloys Operations    
Disaggregation of Revenue [Line Items]    
Total net sales 724.1 656.1
Specialty Alloys Operations | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 730.4 659.6
Specialty Alloys Operations | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (6.3) (3.5)
Specialty Alloys Operations | United States | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 412.9 380.7
Specialty Alloys Operations | Europe | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 149.2 154.6
Specialty Alloys Operations | Asia Pacific | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 100.5 82.1
Specialty Alloys Operations | Mexico | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 42.2 19.5
Specialty Alloys Operations | Canada | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 16.2 12.9
Specialty Alloys Operations | Other | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 9.4 9.8
Specialty Alloys Operations | Aerospace and Defense | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 509.2 447.0
Specialty Alloys Operations | Medical | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 56.3 52.9
Specialty Alloys Operations | Energy | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 43.1 53.9
Specialty Alloys Operations | Transportation | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 24.3 20.7
Specialty Alloys Operations | Industrial and Consumer | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 97.5 85.1
Specialty Alloys Operations | Distribution | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 0.0 0.0
Performance Engineered Products    
Disaggregation of Revenue [Line Items]    
Total net sales 74.1 77.6
Performance Engineered Products | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 91.1 93.6
Performance Engineered Products | Intersegment    
Disaggregation of Revenue [Line Items]    
Total net sales (17.0) (16.0)
Performance Engineered Products | United States | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 63.4 57.8
Performance Engineered Products | Europe | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 10.2 15.4
Performance Engineered Products | Asia Pacific | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 8.5 10.6
Performance Engineered Products | Mexico | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 6.6 5.2
Performance Engineered Products | Canada | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 1.2 1.5
Performance Engineered Products | Other | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 1.2 3.1
Performance Engineered Products | Aerospace and Defense | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 26.9 26.1
Performance Engineered Products | Medical | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 24.5 36.2
Performance Engineered Products | Energy | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 3.4 0.8
Performance Engineered Products | Transportation | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 2.6 2.1
Performance Engineered Products | Industrial and Consumer | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales 11.5 10.5
Performance Engineered Products | Distribution | Operating    
Disaggregation of Revenue [Line Items]    
Total net sales $ 22.2 $ 17.9