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Investments - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Feb. 28, 2021 | Feb. 29, 2020 | Feb. 28, 2021 | Feb. 29, 2020 | Aug. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity income from investments | $ (64,109) | $ (34,398) | $ (114,132) | $ (84,060) |
Cost Method Investments | 131,376 |  | 131,376 |  | $ 123,955
Investments | 3,639,453 |  | 3,639,453 |  | 3,630,033
Investment Company, Distributable Earnings | $ 394,000 |  | 394,000 |  |
CF Nitrogen LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  | $ 2,700,000 |  |
Ownership percentage | 10.00% |  | 10.00% |  |
Equity Method Investments | $ 2,651,652 |  | $ 2,651,652 |  | 2,662,618
Ventura Foods, LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investments | $ 374,895 |  | $ 374,895 |  | 381,351
TEMCO, LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage | 50.00% |  | 50.00% |  |
Ardent Mills LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage | 12.00% |  | 12.00% |  |
Equity Method Investments | $ 215,942 |  | $ 215,942 |  | $ 208,927
Nitrogen Production [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity income from investments | $ (31,344) | (27,923) | $ (53,033) | (62,757) |
Foods [Member] | Ventura Foods, LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage | 50.00% |  | 50.00% |  |
Corporate and Other |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity income from investments | $ (14,988) | (10,538) | $ (32,660) | (29,159) |
Ag |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity income from investments | $ (16,945) | $ 4,672 | $ (27,118) | $ 8,829 |

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