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Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Loss) Income (Detail) (Pension Plans, Defined Benefit, USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 25, 2011
Pension Plans, Defined Benefit
  
Comprehensive Income (Loss) [Line Items]  
Current year actuarial loss $ (400,985)
Amortization of actuarial loss 37,901
Amortization of prior service costs 7,580
Change in prior service costs (1,297)
Currency loss (286)
Total $ (357,087)