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Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets [Line Items]      
Non-amortizable intangible assets $ 20,067 $ 20,408  
Amortizable intangible assets 2,852 2,861  
Total intangible assets, gross 22,919 23,269 25,712
Accumulated amortization (925) (717)  
Intangible assets, net $ 21,994 $ 22,552