Derivatives and Fair Value of Financial Instruments - Gain (Loss) on Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Commodities | Cost of sales
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income
Gains (losses) on derivatives	$ 55	$ (52)
Foreign currencies | Cost of sales
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income
Gains (losses) on derivatives	11	1
Foreign currencies | Foreign currency gains (losses), net
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income
Gains (losses) on derivatives	$ (5)	(1)
Equity futures contract | Other investment income (loss), net
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income
Gains (losses) on derivatives		$ (4)