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Inventories
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
INVENTORIES
5.
INVENTORIES

Inventories consisted of the following (in millions):
 
September 30,
2014
 
December 31,
2013
Refinery feedstocks
$
3,100

 
$
2,135

Refined products and blendstocks
3,374

 
3,231

Ethanol feedstocks and products
156

 
166

Materials and supplies
230

 
226

Inventories
$
6,860

 
$
5,758


As of September 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 $5.8 billion and $6.9 billion, respectively. As of September 30, 2014 and December 31, 2013, our non-LIFO inventories accounted for $1.2 billion and $851 million, respectively, of our total inventories.