Segment Reporting - Narrative (Details) $ in Thousands	12 Months Ended
Aug. 31, 2020 USD ($) segment	Aug. 31, 2019 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of reportable segments \| segment	3
Revenues	$ 28,406,365	$ 31,900,453
Ag
Schedule of Equity Method Investments [Line Items]
Revenues	22,926,099	24,720,072
Corporate and Other
Schedule of Equity Method Investments [Line Items]
Revenues	$ 49,132	$ 61,305
CF Industries Nitrogen, LLC \| Nitrogen Production
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	10.00%
Ventura Foods \| Corporate and Other
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%
Ardent Mills, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	12.00%
Ardent Mills, LLC \| Corporate and Other
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	12.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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