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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. 28, 2019 USD ($) lb gal bu | Dec. 31, 2018 USD ($) lb gal bu
Equity future contracts |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 2 | $ 97
Net commodity purchase contracts | Grain |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | bu | 32 | 33
Net commodity purchase contracts | Hogs |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | 34 |
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 | Soybean oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | 84 |
Net commodity sale contracts | Heating oil |  |
Derivative commodity instruments |  |
Nonmonetary notional amount | gal | 4 | 7
Foreign currencies |  |
Derivative commodity instruments |  |
Notional amounts | $ | $ 34 | $ 82

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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