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Summary of Stock-Option Awards (Detail) (USD $)
 12 Months Ended
Dec. 25, 2011
Year
Dec. 26, 2010
Year
Dec. 27, 2009
Year
Shares      
Outstanding at beginning of year 23,649,290 25,243,251 27,106,695
Granted 1,333,597 3,451,481 3,171,867
Exercised (496,749) (332,060) (44,250)
Canceled/Expired (4,145,847) (4,713,382) (4,991,061)
Outstanding at end of year 20,340,291 23,649,290 25,243,251
Options exercisable at year end 15,857,692 17,075,622 19,788,317
Weighted average grant date fair value of options granted during the year $ 7.63 $ 7.22 $ 3.41
Weighted average exercise price      
Outstanding at beginning of year $ 52.08 $ 58.68 $ 66.58
Granted $ 15.79 $ 15.23 $ 8.00
Exercised $ 5.71 $ 6.00 $ 7.53
Canceled/Expired $ 67.61 $ 63.70 $ 69.83
Outstanding at end of year $ 47.66 $ 52.08 $ 58.68
Options exercisable at year end $ 57.26 $ 66.48 $ 69.76
Weighted average remaining contractual term      
Outstanding at beginning of year 3.9 4.1 4.3
Granted         
Exercised         
Canceled/Expired         
Outstanding at end of year 3.5 3.9 4.1
Options exercisable at year end 2.7 2.8 3.3
Aggregate intrinsic value      
Outstanding at beginning of year $ 28,819,223 $ 33,560,103 $ 68,360
Outstanding at end of year 17,184,761 28,819,223 33,560,103
Options exercisable at year end $ 10,644,474 $ 8,698,148 $ 3,662,795