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Fair Value Measurements (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 03, 2013
Feb. 01, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Maturity Period Of Cash Equivalents 90  
Cost-method Investments, Aggregate Carrying Amount $ 164 $ 157