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