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REVENUE RECOGNITION - Revenue Recognition Method (Details) - Americas Fabrication - Recognized over Time
3 Months Ended 9 Months Ended
May 31, 2021
May 31, 2020
May 31, 2021
May 31, 2020
Fabricated Product and Installation Services        
Disaggregation of Revenue [Line Items]        
Contract as percent of total segment revenue (percent) 7.00% 11.00% 10.00% 12.00%
Fabricated Product without Installation Services        
Disaggregation of Revenue [Line Items]        
Contract as percent of total segment revenue (percent) 9.00% 12.00% 9.00% 11.00%