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Investments - Schedule of Investments (Details) - USD ($) $ in Thousands | 7 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014 | May 31, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity (income) loss from investments |  | $ (175,777) | $ (107,850) | $ (107,446) |
Net income attributable to CHS Inc. |  | 424,192 | 781,045 | 1,081,435 |
Cost Method Investments | $ 127,577 | 127,577 | 130,456 |  |
Investments | 3,795,976 | 3,795,976 | 1,002,092 |  |
CF Nitrogen LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investment, Summarized Financial Information, Revenue | 1,027,142 |  |  |  |
Equity Method Investment, Summarized Financial Information, Current Assets | 534,878 | 534,878 |  |  |
Equity Method Investments | 2,796,323 | 2,796,323 | 0 |  |
Equity Method Investment, Summarized Financial Information, Noncurrent Assets | 7,043,121 | 7,043,121 |  |  |
Equity Method Investment, Summarized Financial Information, Current Liabilities | 556,696 | 556,696 |  |  |
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities | 0 | 0 |  |  |
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss) | 243,911 |  |  |  |
Equity Method Investment, Summarized Financial Information, Net Income (Loss) | 186,665 |  |  |  |
Net income attributable to CHS Inc. | 74,700 |  |  |  |
Ventura Foods, LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investments | $ 369,487 | $ 369,487 | 347,749 |  |
Ardent Mills LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 12.00% | 12.00% |  |  |
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital |  |  |  | 121,200 |
Equity Method Investments | $ 194,986 | $ 194,986 | 196,808 |  |
Horizon Milling, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 24.00%
Equity Method Investment, Additional Cash Contribution |  |  |  | 32,800 |
Equity Method Investment, Realized Gain (Loss) on Disposal |  |  |  | $ 109,200 |
TEMCO, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% | 50.00% |  |  |
Joint venture contract, term |  | 25 years |  |  |
Equity Method Investments | $ 44,578 | $ 44,578 | 57,656 |  |
Cargill, Inc. [Member] | TEMCO, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership of joint venture partner | 50.00% | 50.00% |  |  |
Miscellaneous Investments [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Method Investments | $ 263,025 | $ 263,025 | $ 269,423 |  |
Nitrogen Production [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity (income) loss from investments |  | (74,700) |  |  |
Nitrogen Production [Member] | CF Nitrogen LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity (income) loss from investments |  | $ 74,700 |  |  |
Equity Method Investment, Ownership Percentage | 11.40% | 11.40% |  |  |

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