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Share-Based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Proceeds from exercise of stock options     $ 12 $ 24 [1]
Stock Option Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value of options vested     8 9
Proceeds from exercise of stock options $ 2 $ 10 12 24
Tax benefit realized from options exercised 2 $ 7 8 $ 17
Restricted Stock and Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 10   $ 10  
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number 361,137 678,466 361,137 678,466
Fair value of awards     $ 14 $ 8
Awards vesting period description     Generally, awards fully vest after the passage of time, typically three years. However, RSU awards made in connection with the Company's performance-based long-term incentive program are earned after the attainment of certain performance metrics and vest after the passage of time.  
Nonvested Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 7   $ 7  
Unrecognized compensation cost related to nonvested stock options, weighted-average period expected to be recognized     1 year 6 months  
[1] Amounts for the thirty-nine weeks ended October 29, 2016 have been revised from previously reported amounts to reflect the adoption of new accounting standards in the first quarter of 2017. For additional information, see the Recently Adopted Accounting Pronouncements note.