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Summary of Significant Accounting Policies (Receivables) (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Feb. 02, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net $ 2,992 $ 2,106
Card receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 992 778
Rebate receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 987 668
Customer receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net 571 292
Other receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables, net $ 442 $ 368