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Property and Leases - Schedule of assets and liabilities related to operating and finance leases (Details) - USD ($)
$ in Millions
Aug. 01, 2021
Jan. 31, 2021
Assets    
Operating lease assets $ 5,960 $ 5,962
Finance lease assets 2,790 2,493
Total lease assets 8,750 8,455
Current:    
Operating lease liabilities 814 828
Finance lease liabilities 180 66
Long-term:    
Operating lease liabilities 5,360 5,356
Finance lease liabilities 2,905 2,700
Total lease liabilities 9,259 8,950
Finance lease asset accumulated amortization $ 930 $ 815