Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 9,608,983	$ 12,026,051	$ 30,087,121	$ 36,098,738
Energy
Disaggregation of Revenue [Line Items]
Revenues	2,067,178	2,264,087	6,541,840	7,552,294
Ag
Disaggregation of Revenue [Line Items]
Revenues	7,523,656	9,743,976	23,486,932	28,497,690
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	18,149	17,988	58,349	48,754
ASC Topic 606
Disaggregation of Revenue [Line Items]
Revenues	4,561,521	5,281,943	12,300,437	14,552,204
ASC Topic 606 | Energy
Disaggregation of Revenue [Line Items]
Revenues	1,875,368	1,980,243	5,896,394	6,775,463
ASC Topic 606 | Ag
Disaggregation of Revenue [Line Items]
Revenues	2,680,506	3,295,312	6,385,233	7,757,867
ASC Topic 606 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	5,647	6,388	18,810	18,874
ASC Topic 815
Disaggregation of Revenue [Line Items]
Revenues	5,028,055	6,728,403	17,721,033	21,500,984
ASC Topic 815 | Energy
Disaggregation of Revenue [Line Items]
Revenues	191,810	283,844	645,446	776,831
ASC Topic 815 | Ag
Disaggregation of Revenue [Line Items]
Revenues	4,836,245	6,444,559	17,075,587	20,724,153
ASC Topic 815 | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other Guidance
Disaggregation of Revenue [Line Items]
Revenues	19,407	15,705	65,651	45,550
Other Guidance | Energy
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Other Guidance | Ag
Disaggregation of Revenue [Line Items]
Revenues	6,905	4,105	26,112	15,670
Other Guidance | Corporate and Other
Disaggregation of Revenue [Line Items]
Revenues	$ 12,502	$ 11,600	$ 39,539	$ 29,880