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Merchandise Inventories (Tables)
12 Months Ended
Jan. 31, 2015
Inventory Disclosure [Abstract]  
Merchandise Inventories

 
 
 
 
 
2014
 
2013
  
 
(in millions)
LIFO inventories
 
$
821
 
 
$
746
 
FIFO inventories
 
 
429
 
 
 
474
 
Total merchandise inventories
 
$
1,250
 
 
$
1,220