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Inventories
6 Months Ended
Jun. 30, 2011
Inventories  
Inventories

5.                                      Inventories

 

Inventories (principally using the last-in, first-out (LIFO) method) are comprised of the following:

 

(Millions of dollars)

 

June 30,
2011

 

December 31,
2010

 

Raw materials

 

$3,263

 

$2,766

 

Work-in-process

 

1,911

 

1,483

 

Finished goods

 

5,937

 

5,098

 

Supplies

 

248

 

240

 

Total inventories

 

$11,359

 

$9,587