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Derivatives and Fair Value of Financial Instruments - Instruments and Agreements (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions | Dec. 31, 2019 USD ($) gal lb bu | Dec. 31, 2018 USD ($) gal lb bu
--- | --- | ---
Net commodity purchase contracts | Grain |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | bu | 17 | 33
Net commodity purchase contracts | Soybean oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount |  | 8
Net commodity sale contracts | Hogs |  |
Derivative commodity instruments |  |
Nonmonetary notional amount |  | 26
Net commodity sale contracts | Heating oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | gal | 12 | 7
Net commodity sale contracts | Soybean oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | 132 |
Foreign currencies |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 78 | $ 82
Equity futures contract |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 0 | $ 97

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