Annual report pursuant to Section 13 and 15(d)

Components of Pension Cost (Detail)

v2.4.1.9
Components of Pension Cost (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Defined Benefit Plan Disclosure [Line Items]      
Service cost - benefits earned during the year $ 24,163us-gaap_DefinedBenefitPlanServiceCost $ 25,445us-gaap_DefinedBenefitPlanServiceCost $ 23,198us-gaap_DefinedBenefitPlanServiceCost
Interest cost on projected benefit obligations 81,496us-gaap_DefinedBenefitPlanInterestCost 72,003us-gaap_DefinedBenefitPlanInterestCost 77,013us-gaap_DefinedBenefitPlanInterestCost
Expected return on plan assets (90,674)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets (94,585)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets (80,619)us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets
Amortization of deferred amounts, Net deferred actuarial losses 37,518us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses 85,356us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses 69,744us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Amortization of deferred amounts, Deferred prior service costs 5,445us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit 1,270us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit 3,357us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Total pension expense $ 57,948us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost $ 89,489us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost $ 92,693us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Discount rate 4.64%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 3.91%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate 4.94%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Expected long-term return on plan assets 4.73%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 5.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets 6.38%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Rate of compensation increase 3.53%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease 3.82%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease 3.85%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease