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Financing (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended
May 28, 2011
Apr. 30, 2011
May 01, 2010
Financing      
Debt repaid in period   $ 330  
Debt instrument, principal outstanding   612  
Decrease in interest payable effective rate 0.25%    
Effective interest rate of debt instrument 8.125%    
Maximum potential increase in debt interest rate due to potential downgrades in debt ratings 1.75%    
Maximum potential decrease in debt interest rate due to potential upgrades in debt ratings 0.25%    
Cash paid for repurchase of Company debt     526
Amount of outstanding debt repurchased before maturity     500
Additional interest expense from early repurchase of debt     $ 27