Derivatives and Other Financial Instruments - Schedule of Carrying Values and Fair Values of Other Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Carrying Value [Member]
Derivative [Line Items]
Cash and cash equivalents	$ 665	$ 1,437
Restricted cash	24	18
Noncurrent receivables	19	19
Available-for-sale securities	120	119
Short-term borrowings	53	57
Commercial paper
Long-term debt due within one year	85	655
Long-term debt, less amount due within one year	7,609	7,607
Fair Value [Member]
Derivative [Line Items]
Cash and cash equivalents	665	1,437
Restricted cash	24	18
Noncurrent receivables	19	19
Available-for-sale securities	120	119
Short-term borrowings	53	57
Commercial paper
Long-term debt due within one year	85	1,040
Long-term debt, less amount due within one year	$ 8,128	$ 7,863