v2.4.0.6
Expected Future Amortization Expense of Acquired Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Expected Amortization Expense [Line Items]    
2013 $ 159  
2014 143  
2015 126  
2016 103  
2017 82  
Thereafter 112  
Acquired Intangibles, Net $ 725 [1] $ 647 [1]
[1] Intangible assets have estimated useful lives of between one and 10 years.