Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 11,306,848	$ 10,332,588	$ 24,072,687	$ 21,213,345
Energy
Disaggregation of Revenue [Line Items]
Revenues	2,168,901	2,027,999	5,288,207	4,331,986
Ag
Disaggregation of Revenue [Line Items]
Revenues	9,120,470	8,295,931	18,753,714	16,865,190
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	17,477	8,658	30,766	16,169
ASC Topic 606
Disaggregation of Revenue [Line Items]
Revenues	3,848,947	3,919,559	9,270,261	8,502,042
ASC Topic 606 | Energy
Disaggregation of Revenue [Line Items]
Revenues	1,993,065	1,849,505	4,795,220	3,896,781
ASC Topic 606 | Ag
Disaggregation of Revenue [Line Items]
Revenues	1,849,095	2,066,065	4,462,555	4,597,682
ASC Topic 606 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	6,787	3,989	12,486	7,579
ASC Topic 815
Disaggregation of Revenue [Line Items]
Revenues	7,446,077	6,403,155	14,772,581	12,689,465
ASC Topic 815 | Energy
Disaggregation of Revenue [Line Items]
Revenues	175,836	178,494	492,987	435,205
ASC Topic 815 | Ag
Disaggregation of Revenue [Line Items]
Revenues	7,270,241	6,224,661	14,279,594	12,254,260
ASC Topic 815 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other Guidance
Disaggregation of Revenue [Line Items]
Revenues	11,824	9,874	29,845	21,838
Other Guidance | Energy
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other Guidance | Ag
Disaggregation of Revenue [Line Items]
Revenues	1,134	5,205	11,565	13,248
Other Guidance | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	$ 10,690	$ 4,669	$ 18,280	$ 8,590