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Financial Instruments - Additional Information (Detail) (USD $)
9 Months Ended 9 Months Ended
Sep. 06, 2014
Sep. 07, 2013
Sep. 06, 2014
Commodity contracts
Sep. 06, 2014
Foreign Exchange Contract
Sep. 07, 2013
Foreign Exchange Contract
Sep. 06, 2014
Interest rate derivatives
Dec. 28, 2013
Interest rate derivatives
Sep. 07, 2013
Interest rate derivatives
Sep. 06, 2014
Designated as Hedging Instrument [Member]
Commodity contracts
Sep. 07, 2013
Designated as Hedging Instrument [Member]
Commodity contracts
Sep. 06, 2014
Not Designated as Hedging Instrument [Member]
Commodity contracts
Sep. 07, 2013
Not Designated as Hedging Instrument [Member]
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]                        
Derivative maturity term, maximum     3 years 2 years                
Expected reclassification of net gains (losses) related to hedge from accumulated OCI into net income within the next 12 months     $ 19,000,000 $ 3,000,000   $ 20,000,000            
Derivative, Notional Amount       2,600,000,000 2,800,000,000 9,300,000,000   7,100,000,000 68,000,000 512,000,000 1,100,000,000 947,000,000
Percentage of total debt, net of related interest rate derivatives, exposed to variable interest rates           35.00% 31.00%          
Available-for-sale Equity Securities, Gross Unrealized Gain 121,000,000 92,000,000                    
Debt obligations $ 34,000,000,000