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Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
Intangibles, net $ 988 $ 1,104
Investments 102 193
Cash surrender value of life insurance 14 492
Other 141 155
Other assets, noncurrent, total $ 1,245 $ 1,944