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Segment Data Segment Data - Sales by End Market (Details)
 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Revenue from External Customer [Line Items]      
Sales by End Market 100.00% 100.00% 100.00%
General Engineering [Member]      
Revenue from External Customer [Line Items]      
Sales by End Market 39.00% 38.00% 36.00%
Transportation [Member]      
Revenue from External Customer [Line Items]      
Sales by End Market 20.00% 21.00% 21.00%
Energy [Member]      
Revenue from External Customer [Line Items]      
Sales by End Market 18.00% 17.00% 19.00%
Earthworks [Member]      
Revenue from External Customer [Line Items]      
Sales by End Market 15.00% 16.00% 17.00%
Aerospace and Defense [Member]      
Revenue from External Customer [Line Items]      
Sales by End Market 8.00% 8.00% 7.00%