Long-Term Debt - Long-Term Debt Obligations (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Total debt	$ 3,967	$ 3,691
Other long-term debt	967	691
Less current portion of long-term debt	(753)	(579)
Face value of long-term debt	3,214	3,112
0.65% Notes due on November 27, 2015
Debt Instrument [Line Items]
Stated interest rate	0.65%
Total debt	750	750
1.20% Notes due on November 29, 2017
Debt Instrument [Line Items]
Stated interest rate	1.20%
Total debt	1,000	1,000
2.50% Notes due on November 29, 2022
Debt Instrument [Line Items]
Stated interest rate	2.50%
Total debt	$ 1,250	$ 1,250