Annual report pursuant to Section 13 and 15(d)

Fair Value of Investments Held by Pension Plan (Detail)

v2.4.0.6
Fair Value of Investments Held by Pension Plan (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 1,332,211 $ 1,144,178 $ 1,211,588
Cash and Cash Equivalents
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 119,962 [1] 38,200 [1]  
US Treasury and Government
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 39,361 132,696  
Corporate Government and Foreign Bonds
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 432,410 393,884  
Real Estate
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 45,922 38,512  
Insurance Contracts
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 34,843 28,779  
Commodities
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 821 [1] (236) [2]  
Payable for Securities
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   (47,900) [3]  
Equity Securities | Domestic
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 314,052 330,663  
Equity Securities | Foreign
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 344,840 229,580  
Quoted Prices In Active Markets For Identical Assets, Level 1
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 41,989 589,295  
Quoted Prices In Active Markets For Identical Assets, Level 1 | Cash and Cash Equivalents
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,837 [1] 6,086 [1]  
Quoted Prices In Active Markets For Identical Assets, Level 1 | US Treasury and Government
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 39,331 114,026  
Quoted Prices In Active Markets For Identical Assets, Level 1 | Real Estate
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   38,512  
Quoted Prices In Active Markets For Identical Assets, Level 1 | Commodities
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 821 [1] (236) [2]  
Quoted Prices In Active Markets For Identical Assets, Level 1 | Equity Securities | Domestic
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   329,455  
Quoted Prices In Active Markets For Identical Assets, Level 1 | Equity Securities | Foreign
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   101,452  
Significant Other Observable Inputs, Level 2
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,290,222 554,883  
Significant Other Observable Inputs, Level 2 | Cash and Cash Equivalents
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 118,125 [1] 32,114 [1]  
Significant Other Observable Inputs, Level 2 | US Treasury and Government
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 30 18,670  
Significant Other Observable Inputs, Level 2 | Corporate Government and Foreign Bonds
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 432,410 393,884  
Significant Other Observable Inputs, Level 2 | Real Estate
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 45,922    
Significant Other Observable Inputs, Level 2 | Insurance Contracts
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 34,843 28,779  
Significant Other Observable Inputs, Level 2 | Payable for Securities
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   (47,900) [3]  
Significant Other Observable Inputs, Level 2 | Equity Securities | Domestic
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 314,052 1,208  
Significant Other Observable Inputs, Level 2 | Equity Securities | Foreign
      
Schedule of Pension Plan Assets by Fair Value [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 344,840 $ 128,128  
[1] Includes cash held by individual investment managers of other asset classes for liquidity purposes. Level 2 includes an institutional fund that invests primarily in short-term U.S. government securities.
[2] Consists of derivative commodity futures.
[3] Represents payable for purchased securities not yet settled.