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Basis of Presentation (Details)
$ in Millions
3 Months Ended
Apr. 29, 2017
USD ($)
Apr. 30, 2016
USD ($)
Jan. 28, 2017
USD ($)
Jan. 30, 2016
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Number of Weeks in Fiscal Period 13 13    
Reporting period lag for consolidation of financial results 1 month      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Other Noncash Income (Expense) $ (1) $ (3)    
Net Cash Provided by (Used in) Operating Activities 243 492    
Net Cash Provided by (Used in) Investing Activities (423) (40)    
Proceeds from (Payments for) Other Financing Activities 0 10    
Net Cash Provided by (Used in) Financing Activities (413) (621)    
Cash, cash equivalents and restricted cash as beginning of period     $ 2,433 $ 2,161
Cash, cash equivalents and restricted cash at end of period 1,834 2,032 $ 2,433  
ASU adoption cumulative adjustment (2)      
Retained Earnings [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
ASU adoption cumulative adjustment $ (12)      
As reported [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Other Noncash Income (Expense)   (12)    
Net Cash Provided by (Used in) Operating Activities   483    
Increase (Decrease) in Restricted Cash and Investments   (2)    
Net Cash Provided by (Used in) Investing Activities   (42)    
Proceeds from (Payments for) Other Financing Activities   19    
Net Cash Provided by (Used in) Financing Activities   (612)    
Increase (Decrease) in cash, cash equivalents and restricted cash   (131)    
Cash, cash equivalents and restricted cash as beginning of period       1,976
Cash, cash equivalents and restricted cash at end of period   1,845    
Accounting Standards Update 2016-18 [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase (Decrease) in Restricted Cash and Investments   2    
Net Cash Provided by (Used in) Investing Activities   2    
Increase (Decrease) in cash, cash equivalents and restricted cash   2    
Cash, cash equivalents and restricted cash as beginning of period       185
Cash, cash equivalents and restricted cash at end of period   187    
As Adjusted [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Other Noncash Income (Expense)   (3)    
Net Cash Provided by (Used in) Operating Activities   492    
Increase (Decrease) in Restricted Cash and Investments   0    
Net Cash Provided by (Used in) Investing Activities   (40)    
Proceeds from (Payments for) Other Financing Activities   10    
Net Cash Provided by (Used in) Financing Activities   (621)    
Increase (Decrease) in cash, cash equivalents and restricted cash   (129)    
Cash, cash equivalents and restricted cash as beginning of period       $ 2,161
Cash, cash equivalents and restricted cash at end of period   2,032    
Accounting Standards Update 2016-09 [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Other Noncash Income (Expense)   9    
Net Cash Provided by (Used in) Operating Activities   9    
Proceeds from (Payments for) Other Financing Activities   (9)    
Net Cash Provided by (Used in) Financing Activities   $ (9)