Quarterly report pursuant to Section 13 or 15(d)

Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail)

v2.4.0.8
Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Cost    
Due in one year or less $ 535  
Due after one year through three years 442  
Due after three years through five years 18  
Due after five years 94  
Marketable Securities, Debt Maturities, Amortized Cost, Total 1,089  
Equity securities 2  
Total Amortized Cost 1,091 582
Estimated Fair Value    
Due in one year or less 534  
Due after one year through three years 442  
Due after three years through five years 18  
Due after five years 93  
Marketable Securities, Debt Maturities, Fair Value, Total 1,087  
Equity securities 2  
Total Estimated Fair Value $ 1,089