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Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
2 Months Ended 12 Months Ended
Mar. 18, 2020
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Feb. 23, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   22.5      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   9.4      
Total cost of shares repurchased   $ 1,009 $ 1,493 $ 2,009  
Number of shares repurchased and retired   14.0 21.2 35.1  
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Term   10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years      
Weighted-average grant-date fair value   $ 19.81 $ 20.34 $ 12.52  
Aggregate intrinsic value   $ 59 $ 33 $ 57  
Proceeds from Stock Options Exercised   40 30 156  
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options   14 $ 7 $ 19  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 10      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   2 years 10 months 24 days      
Employee Stock Option [Member] | Share-based Payment Arrangement, Tranche One [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Annual Vesting Percentage   33.00%      
Time-Based Share Awards [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 116      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   1 year 9 months 18 days      
Time-Based Share Awards [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   1 year      
Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock Repurchase Program, Authorized Amount         $ 3,000
Subsequent Event [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total cost of shares repurchased $ 56        
Number of shares repurchased and retired 0.6