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Investments - Narrative (Details) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 01, 2016 USD ($) | Aug. 31, 2014 USD ($) | Feb. 01, 2096 USD ($) | Aug. 31, 2016 USD ($) T | Aug. 31, 2015 USD ($) | May 31, 2014
CF Nitrogen LLC [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Payments to Acquire Equity Method Investments | $ 2,800,000,000 |  |  |  |  |
Supply agreement, term | 80 years |  |  |  |  |
Maximum annual granular urea eligible for purchases | T |  |  |  | 1,100,000 |  |
Maximum annual UAN eligible for purchases | T |  |  |  | 580,000 |  |
Equity Method Investments |  |  |  | $ 2,796,323,000 | $ 0 |
TEMCO, LLC [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Equity Method Investments |  |  |  | $ 44,578,000 | 57,656,000 |
TEMCO, LLC [Member] | Ag [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Horizon Milling, LLC [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 24.00%
Equity Method Investment, Realized Gain (Loss) on Disposal |  | $ 109,200,000 |  |  |  |
Ventura Foods, LLC |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity value exceeding carrying value |  |  |  | $ 12,900,000 |  |
Equity Method Investments |  |  |  | $ 369,487,000 | $ 347,749,000 |
Ventura Foods, LLC | Ag [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Scenario, Forecast [Member] | CF Nitrogen LLC [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investments |  |  | $ 0 |  |  |

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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