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Related Parties (Schedule of Related Party Transactions) (Details) - USD ($)
$ in Millions
3 Months Ended
May 01, 2020
May 03, 2019
Jan. 31, 2020
Related Party Transaction [Line Items]      
Unearned Revenue $ 9,218   $ 9,268
Dell      
Related Party Transaction [Line Items]      
Customer deposits 184   194
Dell | Reseller revenue      
Related Party Transaction [Line Items]      
Revenue and Receipts 864 $ 665  
Unearned Revenue 3,975   3,787
Dell | Internal-use revenue      
Related Party Transaction [Line Items]      
Revenue and Receipts 18 12  
Unearned Revenue 46   $ 57
Dell | Collaborative technology project receipts      
Related Party Transaction [Line Items]      
Revenue and Receipts 3 2  
Dell | Purchases and leases of products and purchases of services      
Related Party Transaction [Line Items]      
Related party costs 44 80  
Dell | Dell subsidiary support and administrative costs      
Related Party Transaction [Line Items]      
Related party costs $ 27 $ 37