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Interline Acquisition (Narrative) (Details) - USD ($)
$ in Millions
Aug. 24, 2015
Jan. 29, 2017
Jan. 31, 2016
Business Acquisition [Line Items]      
Goodwill   $ 2,093 $ 2,102
Interline Brands Inc [Member]      
Business Acquisition [Line Items]      
Aggregate purchase price $ 1,672    
Goodwill 788    
Interline Brands Inc [Member] | Other Assets [Member] | Trade Names [Member]      
Business Acquisition [Line Items]      
Intangible assets, infinite lived 253    
Interline Brands Inc [Member] | Other Assets [Member] | Customer Relationships [Member]      
Business Acquisition [Line Items]      
Intangible assets, finite lived $ 310    
Intangible assets, weighted average useful life 12 years