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New Accounting Pronouncement Leases (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
May 04, 2019
Feb. 02, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Operating Lease, Liability $ 3,677  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 125  
Accounting Standards Update 2016-02 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets   $ 2
Operating Lease, Liability   3,700
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability   3,300
Difference Between ROU Asset and Lease Liabilities upon adoption of ASC 842   $ 470