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Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Dec. 25, 2011
Comprehensive Income (Loss) [Line Items]      
Current year actuarial loss $ 286,778 $ (230,799) $ (403,495)
Change in prior service (costs) credit 319 0 (1,297)
Amortization of actuarial loss 64,381 55,372 43,345
Amortization of prior service costs (1,599) (11,501) (11,930)
Settlement charge 3,077 7,946 0
Pension and other postretirement benefit items 342,798 (190,357) (373,672)
Pension Plan, Defined Benefit [Member]
      
Comprehensive Income (Loss) [Line Items]      
Current year actuarial loss 270,568    
Change in prior service (costs) credit (177)    
Amortization of actuarial loss 63,212    
Amortization of prior service costs 7,566    
Settlement charge 3,077    
Currency loss (10,158)    
Pension and other postretirement benefit items $ 334,088