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Financial Instruments - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 15, 2013
Dec. 29, 2012
Jun. 16, 2012
Derivative Instruments, Gain (Loss) [Line Items]      
Debt obligations $ 31,000,000,000    
Commodity contracts
     
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative maturity term, maximum 3 years    
Expected reclassification of net gains (losses) related to hedge from accumulated OCI into net income within the next 12 months (31,000,000)    
Face value of open commodity derivative contracts qualified for hedging 506,000,000   538,000,000
Face value of open commodity derivative contracts not qualified for hedging 988,000,000   563,000,000
Foreign Exchange Contract
     
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative maturity term, maximum 2 years    
Expected reclassification of net gains (losses) related to hedge from accumulated OCI into net income within the next 12 months 21,000,000    
Foreign currency derivatives at face value, net 3,000,000,000   2,600,000,000
Interest rate derivatives
     
Derivative Instruments, Gain (Loss) [Line Items]      
Expected reclassification of net gains (losses) related to hedge from accumulated OCI into net income within the next 12 months (23,000,000)    
Notional amount of interest rate derivatives $ 7,700,000,000   $ 7,300,000,000
Percentage of total debt, net of related interest rate derivatives, exposed to variable interest rates 27.00% 27.00%