Lines of Credit and Long-Term Debt - Maturities and foreign subsidiary obligations (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Notes Payable and Long Term Debt
Short-term loan	$ 62	$ 39
Maturities of long-term debt
2020	62
2021	53
2022	8
2023	7
2024	7
Thereafter	$ 656
Minimum
Notes Payable and Long Term Debt
Time lag for reporting financial information	1 month
Maximum
Notes Payable and Long Term Debt
Time lag for reporting financial information	3 months
Sugar and Alcohol
Notes Payable and Long Term Debt
Short-term loan	$ 54	$ 29
Interest rate (as a percent)	3.20%	3.10%
Time lag for reporting financial information	1 month
Foreign subsidiary obligations
Notes Payable and Long Term Debt
Weighted average interest rate (as a percent)	3.50%	3.80%
Foreign subsidiary obligations \| Property, Plant and Equipment
Notes Payable and Long Term Debt
Collateral amount	$ 1

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