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Property and Leases - Schedule of assets, liabilities and other related to operating and finance leases (Details) - USD ($)
$ in Millions
Aug. 04, 2019
Feb. 03, 2019
Assets [Abstract]    
Operating lease assets $ 5,789 $ 0
Finance lease assets 863  
Total lease assets 6,652  
Current:    
Operating lease liabilities 831 0
Finance lease liabilities 67  
Long-term:    
Operating lease liabilities 5,263 $ 0
Finance lease liabilities 1,020  
Total lease liabilities $ 7,181