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Impact of Derivative Financial Instruments on Statements of Income (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 27, 2012
Oct. 29, 2011
Oct. 27, 2012
Oct. 29, 2011
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in income $ (2,741) $ 12,682 $ 6,290 $ 4,815
Intercompany Balances, Primarily Short-Term Debt And Related Interest | Fair Value Hedges | Selling, General And Administrative Expenses
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in income (7,227) (2,162) 6,038 (3,140)
Diesel Fuel Contracts | Economic Hedges For Which Hedge Accounting Was Not Elected | Cost Of Sales, Including Buying And Occupancy Costs
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in income 1,837 (975) 134 28
Merchandise Purchase Commitments | Economic Hedges For Which Hedge Accounting Was Not Elected | Cost Of Sales, Including Buying And Occupancy Costs
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (loss) recognized in income $ 2,649 $ 15,819 $ 118 $ 7,927