Derivatives and Other Financial Instruments - Schedule of Carrying Values and Fair Values of Other Financial Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Carrying Value[Member]
Derivative [Line Items]
Cash and cash equivalents	$ 1,384	$ 1,919
Restricted cash	33	37
Noncurrent receivables	19	17
Available-for-sale securities	177	193
Short-term borrowings	40	38
Commercial paper	0	0
Long-term debt due within one year	772	21
Contingent payment related to an acquisition	131	130
Long-term debt, less amount due within one year	8,257	8,993
Fair Value [Member]
Derivative [Line Items]
Cash and cash equivalents	1,384	1,919
Restricted cash	33	37
Noncurrent receivables	19	17
Available-for-sale securities	177	193
Short-term borrowings	40	38
Commercial paper	0	0
Long-term debt due within one year	772	21
Contingent payment related to an acquisition	131	130
Long-term debt, less amount due within one year	$ 8,330	$ 8,922