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Financial Instruments (Impact Of Derivative Financial Instruments On Statements Of Income) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 28, 2012
Apr. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income $ (2,687) $ (22,150)
Intercompany Balances, Primarily Short-Term Debt And Related Interest [Member] | Fair Value Hedges [Member] | Selling, General And Administrative Expenses [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income 3,652 (3,169)
Diesel Fuel Contracts [Member] | Economic Hedges For Which Hedge Accounting Was Not Elected [Member] | Cost Of Sales, Including Buying And Occupancy Costs [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income 1,517 1,262
Merchandise Purchase Commitments [Member] | Economic Hedges For Which Hedge Accounting Was Not Elected [Member] | Cost Of Sales, Including Buying And Occupancy Costs [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (loss) recognized in income $ (7,856) $ (20,243)