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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, 2015
Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]    
Current assets $ 491 $ 418
Long-term assets 343 262
Current liabilities 392 315
Long-term liabilities 167 123
Sales 1,726 1,601
Cost of goods sold, expenses and income taxes 1,522 1,396
Net income $ 204 $ 205