REVENUE RECOGNITION - Revenue Recognition Method (Details) - Americas Fabrication	3 Months Ended	9 Months Ended
	May 31, 2020	May 31, 2020
Recognized as Amounts are Billed
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	52.00%	50.00%
Fabricated Product and Installation Services | Recognized over Time
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	23.00%	25.00%
Fabricated Product without Installation Services | Recognized over Time
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	25.00%