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Net Sales (Details) - USD ($)
$ in Millions
 3 Months Ended
May 05, 2019
Apr. 29, 2018
Disaggregation of Revenue [Line Items]    
Net sales $ 26,381 $ 24,947
Product [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 25,232 23,735
Service [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 1,149 1,212
Major Product Line - Hardlines [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 8,232 7,213
Major Product Line, Décor [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 8,745 8,413
Major Product Line - Building Materials [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 9,404 9,321
Inside the U.S. [Member]    
Disaggregation of Revenue [Line Items]    
Net sales 24,453 23,043
Outside the U.S. [Member]    
Disaggregation of Revenue [Line Items]    
Net sales $ 1,928 $ 1,904