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Derivatives and Fair Value of Financial Instruments - Instruments and Agreements (Details) item in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($)
Commodities |  |  |
Derivative commodity instruments |  |  |
Gains (losses) on derivatives | $ | $ (12) | $ (9) | $ 21
Net commodity purchase contracts | Grain |  |  |
Derivative commodity instruments |  |  |
Nonmonetary notional amount | 33 | 29 |
Net commodity purchase contracts | Soybean oil |  |  |
Derivative commodity instruments |  |  |
Nonmonetary notional amount | 8 | 1 |
Net commodity sale contracts | Hogs |  |  |
Derivative commodity instruments |  |  |
Nonmonetary notional amount | 26 | 13 |
Net commodity sale contracts | Heating oil |  |  |
Derivative commodity instruments |  |  |
Nonmonetary notional amount | 7 | 7 |
Foreign currencies |  |  |
Derivative commodity instruments |  |  |
Notional amounts | $ | $ 82 | $ 20 |
Equity futures contract |  |  |
Derivative commodity instruments |  |  |
Notional amounts | $ | $ 97 | $ 0 |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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