| 
           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% | 
| X | ||||||||||
| 
             
- Definition 
          Maximum cumulative period per calendar year for contribution requirement under agreement. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Maximum period per calendar year month for contribution requirement under agreement. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Minimum contributions requirement per compensable hour under agreement. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Number of non-qualified supplemental retirement defined benefit plans. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Percentage of funded status of pension plans. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of accumulated benefit obligation attributable to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of plan assets attributable to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of contributions made to the multiemployer plan by all employers who participate in the plan. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |