Long-Term Debt - Long-Term Debt Obligations (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 4,000	$ 3,967
Other long-term debt	1,000	967
Less current portion of long-term debt	(860)	(753)
Face value of long-term debt	3,140	3,214
0.65% Notes due on November 27, 2015
Debt Instrument [Line Items]
Stated interest rate	0.65%
Long-term debt	750	750
1.20% Notes due on November 29, 2017
Debt Instrument [Line Items]
Stated interest rate	1.20%
Long-term debt	1,000	1,000
2.50% Notes due on November 29, 2022
Debt Instrument [Line Items]
Stated interest rate	2.50%
Long-term debt	$ 1,250	$ 1,250