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Share-Based Compensation - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 23, 2012
Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ 22 $ 19  
Deferred compensation costs related to unvested awards $ 200   $ 122
Shares reserved under the Stock Plan 36    
RSUs and Service and Performance RSUs
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, weighted average grant-date fair value (in USD per share) $ 37    
Restricted Stock Units
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 2.5    
Stock awards, vesting period 4 years    
Service and Performance RSUs
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 0.2    
Stock Option Program and Stock Appreciation Right Program
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected term (in years) 8 years    
Stock awards, expiration 10 years    
Stock awards, vesting period 4 years    
Shares reserved under the Stock Plan 14    
Employee Stock Option
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, percentage of award vesting annually 25.00%    
Stock options, granted to certain officers and key employees (in shares) 0.1    
Stock options granted in period, weighted average grant-date fair value (in USD per share) $ 13    
Stock options granted in period, weighted average exercise price (in USD per share) $ 39    
Stock Appreciation Rights
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock awards, granted to certain officers, key employees and, for SARS, directors (in shares) 0.7    
Stock awards, percentage of award vesting and becoming exercisable annually 25.00%    
Stock awards, weighted average grant-date fair value (in USD per share) $ 13    
Stock awards, weighted average exercise price (in USD per share) $ 39