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Property and Leases (Net Property and Equipment) (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Feb. 02, 2020
Property, Plant and Equipment [Line Items]    
Property and equipment, at cost $ 48,801 $ 44,860
Less accumulated depreciation and finance lease amortization 24,096 22,090
Net property and equipment 24,705 22,770
Land    
Property, Plant and Equipment [Line Items]    
Property and equipment, at cost 8,543 8,390
Buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment, at cost 18,838 18,432
Furniture, fixtures, and equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, at cost 15,119 13,666
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Finance lease, right-of-use assets 1,925 1,789
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment, at cost 1,068 1,005
Finance leases    
Property, Plant and Equipment [Line Items]    
Finance lease, right-of-use assets $ 3,308 $ 1,578