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Financial Instruments - Narrative (Detail) (USD $)
6 Months Ended
Jun. 29, 2014
Dec. 31, 2013
Jun. 29, 2014
Derivative Financial Instruments [Member]
Short - Term Borrowings      
Commercial paper $ 0 $ 3,000,000,000  
Derivative Financial Instruments and Hedging Activities      
Derivative, net liability position, aggregate fair value 76,000,000    
Posted collateral 78,000,000    
Additional collateral, aggregate fair value 3,000,000    
Credit Risk Derivatives      
Concentration risk, credit risk, financial instrument, maximum exposure     2,300,000,000
Securities received as collateral     $ 1,300,000,000