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Inventories
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
INVENTORIES
5.
INVENTORIES

Inventories consisted of the following (in millions):
 
June 30,
2014
 
December 31,
2013
Refinery feedstocks
$
3,380

 
$
2,135

Refined products and blendstocks
2,732

 
3,231

Ethanol feedstocks and products
182

 
166

Materials and supplies
232

 
226

Inventories
$
6,526

 
$
5,758


As of June 30, 2014 and December 31, 2013, the replacement cost (market value) of last in, first out (LIFO) inventories exceeded their LIFO carrying amounts by approximately $7.2 billion and $6.9 billion, respectively. As of June 30, 2014 and December 31, 2013, our non-LIFO inventories accounted for $914 million and $851 million, respectively, of our total inventories.