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Property and Leases - Schedule of assets and liabilities related to operating and finance leases (Details) - USD ($)
$ in Millions
Nov. 03, 2019
Feb. 03, 2019
Assets [Abstract]    
Operating lease assets $ 5,638 $ 0
Finance lease assets 876  
Total lease assets 6,514  
Current:    
Operating lease liabilities 828 0
Finance lease liabilities 69  
Long-term:    
Operating lease liabilities 5,113 $ 0
Finance lease liabilities 1,035  
Total lease liabilities $ 7,045