REVENUE RECOGNITION - Revenue Recognition Method (Details) - Americas Fabrication	3 Months Ended	6 Months Ended
	Feb. 29, 2020	Feb. 29, 2020
Recognized as Amounts are Billed
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	48.00%	50.00%
Fabricated Product and Installation Services | Recognized over Time
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	27.00%	26.00%
Fabricated Product without Installation Services | Recognized over Time
Disaggregation of Revenue [Line Items]
Contract as percent of total segment revenue (percent)	25.00%	24.00%