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Retirement Plans - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]      
Compensation expense (ESOP) $ 278,529,000 $ 267,099,000 $ 253,093,000
Period during which the Company is required to purchase the shares at fair value after distribution of the shares from the ESOP, months 15 months    
Distributed shares subject to put option, fair value 126,647,000 116,824,000  
ESOP, shares cost 2,146,316,000 2,020,393,000  
Common stock related to ESOP 2,272,963,000 2,137,217,000  
ESOP shares, fair value 5,418,856,000 4,917,283,000  
Percentage of company match approved for eligible contributions 50.00% 50.00% 50.00%
Maximum contribution percentage of employees' eligible annual compensation 10.00%    
Percentage of eligible wages for matching contributions 3.00% 3.00% 3.00%
Maximum amount match per employee 750 750 750
Compensation expenses match to 401(K) plan $ 24,957,000 $ 24,141,000 $ 22,454,000