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Cash Flow Information - Schedule of Cash Paid for Interest and Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statement of Cash Flows [Abstract]      
Interest, net of amount capitalized $ 524 $ 487 $ 441
Income taxes, net of amount refunded $ 324 $ 345 $ 301