Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 10,880,757	$ 8,715,643
Energy
Disaggregation of Revenue [Line Items]
Revenues	2,303,987	1,257,847
Ag
Disaggregation of Revenue [Line Items]
Revenues	8,569,259	7,445,402
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	7,511	12,394
ASC Topic 606
Disaggregation of Revenue [Line Items]
Revenues	4,582,823	2,415,931
ASC Topic 606 | Energy
Disaggregation of Revenue [Line Items]
Revenues	2,047,277	1,064,963
ASC Topic 606 | Ag
Disaggregation of Revenue [Line Items]
Revenues	2,531,956	1,344,508
ASC Topic 606 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	3,590	6,460
ASC Topic 815
Disaggregation of Revenue [Line Items]
Revenues	6,285,970	6,280,125
ASC Topic 815 | Energy
Disaggregation of Revenue [Line Items]
Revenues	256,710	192,884
ASC Topic 815 | Ag
Disaggregation of Revenue [Line Items]
Revenues	6,029,260	6,087,241
ASC Topic 815 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	0	0
Other Guidance
Disaggregation of Revenue [Line Items]
Revenues	11,964	19,587
Other Guidance | Energy
Disaggregation of Revenue [Line Items]
Revenues	0	0
Other Guidance | Ag
Disaggregation of Revenue [Line Items]
Revenues	8,043	13,653
Other Guidance | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	$ 3,921	$ 5,934