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Other Intangible Assets - Estimated Future Amortization Expense for Amortizing intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Other Intangible Assets Disclosure [Abstract]    
2014 $ 315  
2015 307  
2016 285  
2017 239  
2018 229  
Thereafter 828  
Intangible assets, net $ 2,203 $ 2,344