Quarterly report pursuant to Section 13 or 15(d)

Supplemental Retirement Plan and Related Post Retirement Benefits - Additional Information (Detail)

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Supplemental Retirement Plan and Related Post Retirement Benefits - Additional Information (Detail) (USD $)
9 Months Ended 12 Months Ended
Sep. 28, 2013
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]    
Number of non-qualified supplemental retirement defined benefit plans 2  
Minimum contribution per compensable hour $ 2.50  
Compensable hour 184 hours  
Maximum cumulative number of hours per calendar year 2080 hours  
WCTPP [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Plan assets   29,200,000,000
Accumulated plan benefits   35,700,000,000
Contributions of employer   $ 101,000,000
Percentage of fund 90.00%