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Industry Segment Information (Narrative) (Details)
12 Months Ended
Aug. 31, 2022
Segment
Customer
Aug. 31, 2021
Customer
Aug. 31, 2020
Customer
Segment Reporting Information [Line Items]      
Number of reportable segments 2    
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Segment Reporting Information [Line Items]      
Number of major customers | Customer 0 0 0
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Minimum [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 10.00% 10.00% 10.00%
Irrigation [Member]      
Segment Reporting Information [Line Items]      
Number of operating segments 1    
Infrastructure [Member]      
Segment Reporting Information [Line Items]      
Number of operating segments 1