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Derivatives and Fair Value of Financial Instruments-Derivatives (Details) lb in Millions, gal in Millions, bu in Millions, $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 29, 2018 USD ($) lb gal bu | Dec. 31, 2017 USD ($) lb gal bu
Equity future contracts |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 13 | $ 0
Net commodity purchase contracts | Grain |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | bu | 1 | 29
Net commodity purchase contracts | Hogs |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | 5 |
Net commodity purchase contracts | Soybean oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | 31 | 1
Net commodity sale contracts | Hogs |  |
Derivative commodity instruments |  |
Nonmonetary notional amount |  | 13
Net commodity sale contracts | Heating oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | gal | 7 | 7
Foreign currencies |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 49 | $ 20

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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 Nominal mass used to calculate payments on a derivative instrument. + References No definition available. + Details
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