Derivatives and Other Financial Instruments - Schedule of Carrying Values and Fair Values of Other Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Carrying Value [Member]
Derivative [Line Items]
Cash and cash equivalents	$ 1,183	$ 1,437
Restricted cash	15	18
Noncurrent receivables	19	19
Available-for-sale securities	125	119
Short-term borrowings	133	57
Commercial paper	223
Long-term debt due within one year	87	655
Long-term debt, less amount due within one year	7,612	7,607
Fair Value [Member]
Derivative [Line Items]
Cash and cash equivalents	1,183	1,437
Restricted cash	15	18
Noncurrent receivables	19	19
Available-for-sale securities	125	119
Short-term borrowings	133	57
Commercial paper	223
Long-term debt due within one year	87	1,040
Long-term debt, less amount due within one year	$ 8,271	$ 7,863