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Segment Data Segment Data - Sales by End Market (Details)
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
General Engineering [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 47.00% 46.00% 45.00%
Transportation [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 19.00% 17.00% 18.00%
Energy [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 15.00% 16.00% 17.00%
Earthworks [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 14.00% 14.00% 13.00%
Aerospace and defense [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 5.00% 7.00% 7.00%
Metal Cutting [Member] | General Engineering [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 54.00% 53.00% 52.00%
Metal Cutting [Member] | Transportation [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 30.00% 27.00% 29.00%
Metal Cutting [Member] | Energy [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 8.00% 8.00% 8.00%
Metal Cutting [Member] | Aerospace and defense [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 8.00% 12.00% 11.00%
Infrastructure [Member] | General Engineering [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 35.00% 34.00% 34.00%
Infrastructure [Member] | Energy [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 26.00% 28.00% 33.00%
Infrastructure [Member] | Earthworks [Member]      
Revenue from External Customer [Line Items]      
Revenues, percent 39.00% 38.00% 33.00%