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Debt Principal Payments (Net of Unamortized Discounts) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 28, 2012
Debt Disclosure [Abstract]    
2014 $ 52  
2015 319  
2016 297  
2017 301  
2018 843  
Thereafter 1,387  
Long-term debt $ 3,199 $ 2,935