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Summary of Significant Accounting Policies (Receivables) (Details) - USD ($)
$ in Millions
Feb. 03, 2019
Jan. 28, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net $ 1,936 $ 1,952
Credit Card Receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 696 734
Rebate Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 660 609
Trade Accounts Receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 284 261
Other Receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net $ 296 $ 348