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Employee Stock Plans (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Jan. 29, 2012
Y
Jan. 30, 2011
Jan. 31, 2010
Feb. 01, 2009
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting rate for incentive stock options and non-qualified stock options 25.00%      
Percentage by Which Stock Price Has To Exceed Grant Date Price for Performance Option to Vest 25.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Age Of Employee Options May Become Non-Forfeitable 60      
Share-based compensation expense $ 215 [1] $ 214 [1] $ 201 [1]  
Deferred shares 422,000 479,000 666,000  
Percentage the purchase price of shares under the ESPPs is equal to the stock's fair market value 85.00%      
Shares purchased 2,000,000      
ESPP Weighted Average Price Paid for shares purchased $ 33.07      
Employee contributions 8      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value 47 9 1  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 33,170,000 44,467,000 49,309,000 52,014,000
Weighted average remaining life, options outstanding 4      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 317      
Stock options exercisable 22,000,000      
Weighted average exercise price, options exercisable $ 40.70      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 2      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 151      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 25,000,000      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value 290 168 41  
Maximum [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Period Of Restrictions Lapse 5 years      
Stock Options [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation expense 20 20 19  
Unamortized stock-based compensation expense 43      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2      
Share-based Compensation Arrangement by Share-based Payment Award, Period Of Closing Price Of Common Stock Exceeding Stock Option Exercise Price, Consecutive Trading Days 30 days      
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 5 years      
Restricted Stock [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation expense 169 167 158  
Unamortized stock-based compensation expense 287      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2      
Non-Qualified Stock Options Not Part of the Plans [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2,000,000      
Deferred Shares [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation expense 12 14 14  
ESPP [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation expense $ 14 $ 13 $ 10  
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Period 6 months      
Upon Third and Sixth Anniversaries Of Issuance [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment, Award, Restrictions Lapse, Percent Of Stock 25.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Restrictions Lapse, Percent Of Stock 25.00%      
Employee Reaching Age Of 60 Or Upon Tenth Anniversary of Grant Date [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Restrictions Lapse, Percent Of Stock 50.00%      
Employee Reaching Age Of 62 [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Restrictions Lapse, Percent of Stock 50.00%      
U.S. ESPP Plan [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares available for future grants 8,000,000      
Non U.S. ESPP Plan [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares available for future grants 20,000,000      
2005 Plan [Member]
       
Share-Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common Stock, authorized 255,000,000      
Reduction of number of shares available for issuance 2.11      
Shares available for future grants 162,000,000      
[1] Fiscal years ended January 29, 2012, January 30, 2011 and January 31, 2010 include 52 weeks.