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Leases - Additional information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |
Rental expense for operating leases |  | $ 46 | $ 44
Supplemental disclosures of cash flow information: |  |  |
Cash paid for amounts included in the measurement of operating lease liabilities | $ 137 |  |
Cash paid for principal payment of finance lease included in financing activity | 2 |  |
Cash paid for finance lease interest included in operating activity | 1 |  |
Operating lease assets obtained in exchange for new operating lease liabilities | 95 |  |
Finance lease assets obtained in exchange for new finance lease liabilities | $ 46 |  |
Pork | Contract grower agreements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Amount paid under the agreement |  | 48 | 37
Marine and CT&M | Vessel, time and voyage-charters |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Amount paid under the contract |  | $ 111 | $ 96

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