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Commitments and Contingencies - Numbers of Items (Details) $ in Millions							6 Months Ended
	Sep. 30, 2021 USD ($)	Jul. 21, 2021	Jun. 28, 2018 plaintiff	May 15, 2018 USD ($)	Apr. 27, 2018 USD ($)	Mar. 20, 2018 USD ($)	Dec. 31, 2018 plaintiff	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Contingencies
Assets								$ 7,503.0	$ 6,399.0
Pork Product Purchasers \| Pending Litigation
Contingencies
Number of plaintiffs \| plaintiff			12				3
Odette Blanco De Fernandez \| Pending Litigation
Contingencies
Term of concession to develop port facilities		70 years
HSBC \| Pending Litigation
Contingencies
Damages sought	$ 10.0
Interest and other relief sought	$ 3.2
Cereoil
Contingencies
Percentage of ownership								45.00%
Cereoil \| Cereoil Bankruptcy Trustee - Case One \| Pending Litigation
Contingencies
Damages sought						$ 22.0
Cereoil \| Cereoil Bankruptcy Trustee - Case Two \| Pending Litigation
Contingencies
Damages sought					$ 23.0
Total liabilities					53.0
Assets					$ 30.0
Nolston
Contingencies
Percentage of ownership								45.00%
Nolston \| Nolston Bankruptcy Trustee
Contingencies
Damages sought				$ 8.0
Total liabilities				29.0
Assets				$ 15.0