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Related Parties (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Related Parties [Abstract]        
Sales to Tractor Supply $ 0.4 $ 0.3 $ 0.9 $ 0.7