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Financial Information Related to Funded Status of Defined Benefit Pension Plan as Result of Measurement and Lump Sum Payment (Detail) - Funded Plan - USD ($)
$ in Thousands
 9 Months Ended
Oct. 21, 2016
Oct. 29, 2016
Oct. 29, 2016
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation at beginning of year   $ 1,213,000  
Service cost   28,337  
Interest cost   38,754  
Actuarial (gains) losses   231,636  
Benefits paid including lump sum payment $ (103,200) (122,029)  
Expenses paid   (2,980)  
Projected benefit obligation at measurement date   1,386,718  
Fair value of plan assets at beginning of year   1,119,842  
Actual return on plan assets   159,787  
Employer contribution   0  
Benefits paid including lump sum payment $ (103,200) (122,029)  
Expenses paid   (2,980)  
Fair value of plan assets at measurement date   1,154,620  
Projected benefit obligation at measurement date   1,213,000 $ 1,386,718
Fair value of plan assets at measurement date   $ 1,119,842 1,154,620
Funded status - excess obligation at measurement date     232,098
Prior service cost     2,438
Accumulated actuarial losses     416,873
Amounts included in accumulated other comprehensive income (loss)     $ 419,311