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Reconciliation of Benefit Obligations, Plan Assets and Funded Status of Company-Sponsored Retirement Plans (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Dec. 25, 2011
Change in benefit obligations      
Settlements $ (10,743) $ (23,489)  
Benefit obligations at end of year 3,672,249    
Change in plan assets      
Fair value of plan assets at beginning of year 2,552,316 [1]    
Settlements (10,743) (23,489)  
Fair value of plan assets at end of year 3,028,467 [1] 2,552,316 [1]  
Funded status at end of year (643,782)    
Amounts recognized in Consolidated Balance Sheets      
Accrued benefit cost-long-term (632,195) (1,007,325)  
Pension Plan, Defined Benefit [Member]
      
Change in benefit obligations      
Benefit obligations at beginning of year 3,573,085 3,351,494  
Service cost 7,538 7,545 7,833
Defined Benefit Plan, Interest Cost 141,030 155,376 171,339
Plan amendments 177 0  
Plan participants' contributions 4 7  
Actuarial gain (loss) (104,131) 300,525  
Foreign currency translation 21,758 27,526  
Gross benefits paid (230,979) (245,899)  
Acquisitions 274,510 0  
Benefit obligations at end of year 3,672,249 3,573,085 3,351,494
Change in plan assets      
Fair value of plan assets at beginning of year 2,552,316 2,408,768  
Actual return on plan assets 364,652 254,225  
Plan participants' contributions 4 7  
Employer contributions 107,086 137,499  
Gross benefits paid (230,979) (245,899)  
Acquisitions 229,774 0  
Foreign currency translation 16,357 21,205  
Fair value of plan assets at end of year 3,028,467 2,552,316 2,408,768
Funded status at end of year (643,782) (1,020,769)  
Amounts recognized in Consolidated Balance Sheets      
Non Current Assets 3,684 0  
Accrued benefit cost-current (15,271) (13,444)  
Accrued benefit cost-long-term $ (632,195) $ (1,007,325)  
[1] The company uses a Dec. 31 measurement date for its retirement plans.