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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Segment Reporting - Narrative (Details) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
Segment Reporting - Narrative (Details) $ in Thousands	Aug. 31, 2018 USD ($)	May 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Nov. 30, 2017 USD ($)	Aug. 31, 2017 USD ($)	May 31, 2017 USD ($)	Feb. 28, 2017 USD ($)	Nov. 30, 2016 USD ($)	Feb. 28, 2018 USD ($)	Feb. 28, 2017 USD ($)	May 31, 2018 USD ($)	May 31, 2017 USD ($)	Aug. 31, 2018 USD ($) segment	Aug. 31, 2017 USD ($)	Aug. 31, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of reportable segments \| segment													3
Revenues	$ 8,583,982	$ 9,087,328	$ 6,980,153	$ 8,031,884	$ 7,996,339	$ 8,638,410	$ 7,400,773	$ 8,001,904	$ 15,012,037	$ 15,402,677	$ 24,099,365	$ 24,041,087	$ 32,683,347	$ 32,037,426	$ 30,355,260
United States
Schedule of Equity Method Investments [Line Items]
Revenues													$ 29,500,000	$ 29,000,000	$ 26,500,000
TEMCO \| Ag
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%												50.00%
CF Industries Nitrogen, LLC \| Nitrogen Production
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	10.00%												10.00%
Ventura Foods \| Corporate and Other
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%												50.00%
Ardent Mills, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	12.00%												12.00%
Ardent Mills, LLC \| Corporate and Other
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	12.00%												12.00%