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Subsequent Events	6 Months Ended
Subsequent Events	Feb. 28, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events We completed our acquisition of West Central Distribution, LLC, a full-service wholesale distributor of agronomy products headquartered in Willmar, Minnesota, on March 1, 2019. Prior to completing this acquisition and through February 28, 2019, we had a 25% ownership interest in West Central Distribution, LLC, which was accounted for under the equity method of accounting.