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Summary of Significant Accounting Policies - Recently Adopted and Issued Accounting Pronouncements (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 01, 2020
Nov. 03, 2019
Nov. 01, 2020
Nov. 03, 2019
Feb. 02, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Selling, general and administrative $ 6,076 $ 4,942 $ 18,260 $ 14,926  
Accrued salaries and related expenses 2,176   2,176   $ 1,494
COVID-19 employee benefits          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Selling, general and administrative 354   1,700    
Accrued salaries and related expenses $ 311   $ 311