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Investments - Company's Combined Proportionate Share of Major Components of Financial Statements (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 1,680 $ 1,914
Non-current assets 3,573 3,870
Current liabilities 1,266 1,500
Long-term liabilities 994 1,131
Sales 4,142 5,133
Cost of goods sold & expenses 3,949 4,765
Net income $ 193 $ 368